61:
Solve the problem.
Manson is 9 years old. His grandpa is 7 times and 2 years older than Manson. How old is his grandpa?
9 7 + 2
= 63 + 2
= 65
His grandpa is 65 years old.
62:
Solve the problem.
There are 6 small monkeys in the country park. The number of big monkeys is 4 times but 2 fewer than that of small monkeys. How many big monkeys are there?
6 4 2
= 24 2
= 22
There are 22 big monkeysin
the country park.
63:
Solve the problem.
An apple costs 5 dollars. A watermelon costs 30 dollars. What is the total cost of 1 watermelon and 8 apples?
30 + 5 8
= 30 + 40
= 70
The total cost is 70 dollars.
64:
Solve the problem.
Eachsmall pack contains 20 candies. 5 more candies in each large pack. How many candies are there altogetherin 8 large packs?
(20 + 5) 8
= 25 8
=200
There are 200 candiesaltogether.
65:
Solve the problem.
Each egg tart costs 6 dollars. Motherbought half a dozen of egg tarts and she paid 40 dollars. How much change should she get?
40 6 6
= 40 36
= 4
She should get 4 dollars change.
66:
Solve the problem.
A bag of cookies contains 8 pieces. A tin of cookies contains 50 pieces. How many pieces does a tin of cookies contain more than 5 bags of cookies?
50 8 5
= 50 40
= 10
There are 10 pieces more.
67:
Solve the problem.
A chocolate cake costs 4 dollars. 3 cheese cakes cost 10 dollars. How much are 3 chocolate cakes more expensive than 3 cheese cakes?
43 10
= 12 – 10
= 2
They are 2 dollars more expensive.
68:
Solve the problem.
David has 9 five-dollar coins. After buying some stationery with 18 dollars, how much does he still have?
5 9 18
= 45 18
= 27
He still has 27 dollars.
69：
Solve the problem.
A teacher bought 45 boxes of colour chalk. He also bought 15 more boxes of white chalk than colour chalk. How many boxes of chalk did he buy altogether?
45 (45 15)
= 45 60
= 105
The teacher bought 105 boxes
of chalkaltogether.
70：
Solve the problem.
Each ball pen costs 20 dollars at first. Now there is a discount of 4 dollars each. Father buys 6 ball pens. How much should he pay altogether?
(20 4) 6
= 16 6
= 96
He should pay 96 dollarsaltogether.
71：
Solve the problem.
There are 12 white swans in the lake. The number of grey swans is 3 times and 8 more than that of the white swans. How many grey swans are there?
12 3 + 8
= 36 + 8
= 44
There are 44 grey swans.
72：
Solve the problem.
There is 1 seat in the first compartment of a mini train. There are another 8 compartments with 2 seats each. How many seats altogether are there in the mini train?
1 + 2 8
= 1 + 16
= 17
There are 17 seatsaltogether.
73：
Solve the problem.
65 books are donated to a library. 40 of them are story books and the rest are riddle books. How many fewer riddle books than story books?
40 (65 40)
= 40 25
= 15
There are 15 fewer riddle booksthan story books.
74：
Solve the problem.
A museum opens 8 hours in a day from Monday to Saturday.It opens 12 hours on Sunday. How many hours does it open in a week altogether?
8 6 + 12
= 48 + 12
= 60
It opens 60 hours in a weekaltogether.
76：
Solve the problem.
A sweet bun costs 3 dollars. A bag of white bread costs 5 dollars. How much more expensive are 4 sweet buns than 1 bag of white bread?
3 4 5
= 12 5
= 7
They are 7 dollars more expensive.
77：
Solve the problem.
A bag of white bread costs 6 dollars. Mr. Lee bought 4 bags and he paid 100 dollars. How much change should he get?
100 6 4
= 100 24
= 76
He should get 76 dollars change.
78：
Solve the problem.
Fanny has 35 marbles. The number of Sam’s marbles is 3 times but 16 fewer than that of Fanny’s. How many marbles does Sam have?
35 3 – 16
= 105 – 16
= 89
Sam has 89 marbles.
79：
Solve the problem.
A shoe rack can hold 7 pairs of leather shoes and 13 pairs of sport shoes. How many pairs of shoes can 8 shoe racks hold altogether?
(7 + 13) 8
= 20 8
= 160
8 shoe racks can hold 160 pairs of
shoesaltogether.
80：
Solve the problem.
A chocolate ice bar costs 12 dollars. 4 fruit ice bars cost 18 dollars. How much do 4 chocolate ice bars cost more than 4 fruit ice bars?
12 × 4 18
= 48 – 18
= 30
They cost 30 dollars more.
327:
Solve the problem.
There were 4520 dollars in Mary’s bank account. She deposited another 1800 dollars scholarship but she withdrew 300 dollars from her accountlater. How much does she have in her account now?
4520 + 1800 – 300
= 6320 – 300
= 6020
Mary has 6020 dollars in her
account now.
423:
Look at the picture and solve the problems.
(a)Father paid 50 dollars to buy one bag of oranges and one box of strawberries. How much change should he get?
50 – ( 10 + 25 )
= 50 – 35 .
= 15 .
He should get 15 dollars change.
(b)How much more expensive is it to buy a box of strawberries than a bundle of grapes and a bag of oranges?
25 ( 12 10 )
= 25 22 .
= 3 .
It is 3 dollars more expensive.
(c)Mother has 100 dollars. After buying a bundle of grapes and a watermelon, how much does she have?
100 – (12 + 17)
=100 – 29
=71
She has 71 dollars.
424:
Solve the problem.
3748 guests came to an exhibition in the morning. 1328 guests came at noon. In the afternoon, 3567 guests left.How many guests are still in the exhibition?
3748 + 1328 – 3567 .
= 5076 – 3567 .
= 1509 .
There are still 1509 guests.
425:
Solve the problem.
A cook prepared 5485 sets of food. Some guests ate up 3124 sets. The cook prepared another 2745 sets. How many sets of food are there now?
5485 3124 2745
= 2361 2745 .
= 5106 .
There are 5106 sets of food now.
426:
Solve the problem.
3095 lottery tickets were sold in the morning and 2166 tickets were sold at noon. The lottery tickets sold in the afternoon were 2856 fewer than the total number of tickets sold in the morning and the noon. How many lottery tickets were sold in the afternoon?
3095 + 2166 – 2856
= 5261 – 2856
= 2405
2405 lottery tickets were sold in
the afternoon.
427:
Solve the problem.
There is 1 seat in the first compartment of a mini train. There are another 4 compartments with 2 seats each. How many seats altogether are there in the mini train?
1 + 2 4 .
= 1 + 8 .
= 9 .
There are altogether 9 seats.
428:
Solve the problem.
A mini train opens 9 hours in a day from Monday to Saturday. On Sunday, it opens 10 hours. How many hours does it open in a week altogether?
9 6 10 .
= 54 10 .
= 64 .
It opens 64 hours in a week altogether.
429:
Solve the problem.
The ticket for a mini train ride is 8 dollars for children and 12 dollars for adults.What is the total cost for 7 children and 1 adult?
8 7 + 12
= 56 + 12
= 68
The total cost is 68 dollars.
430:
Solve the problem.
A fruit ice bar cost 7 dollars. A chocolate ice bar costs 15 dollars. How much more expensive are 3 fruit ice bars than one chocolate ice bar?
7 × 3 – 15 .
= 21 – 15 .
= 6 .
They are 6 dollars more expensive.
431:
Solve the problem.
A box of ice cream costs 23 dollars. John buys 4 boxes and he pays 100 dollars. How much change should he get?
100 23 4 .
= 100 92 .
= 8 .
He should get 8 dollars change.
432:
Solve the problem.
A box of ice cream costs 43 dollars. Now there is a discount of 4 dollars each. Father bought 3 boxes of ice cream. How much should he pay altogether?
( 43 4 ) 3 .
= 39 3 .
= 117 .
He should pay 117 dollarsaltogether.
434:
Solve the problem.
John is 8 years old. His father is 5 times and 1 year older than him. How old is his father?
8 × 5 + 1 .
= 40 + 1 .
= 41 .
John’s father is 41 years old.
435:
Solve the problem.
A glass costs 4 dollars. Mother bought 6 glasses and she paid 40 dollars. How much change should she get?
40 – 4 × 6 .
= 40 – 24 .
= 16 .
She should get 16 dollars change.
436:
Solve the problem.
A bottle of eye drops costs 27 dollars. John has 3 ten-dollar coins. After buying one bottle of eye drops, how much does he remain?
10 3 – 27
= 30 – 27
= 3
He remains 3 dollars.
437:
Solve the problem.
A pair of glasses costs 135 dollars.A case for glasses costs 82 dollars. What is the total cost to buy one pair of glasses and 2 cases?
135 + 82 2
= 135 + 164
= 299
The total cost is 299 dollars.
626:
Solve the problems.
A bottle of coke costs 18 dollars. A piece of bread costs 9 dollars. John bought a bottle of coke and a piece of bread. How much should he pay?
18 + 9
= 27
He should pay 27 dollars.
He gave a 100-dollar note to the shopkeeper. How much change should he get?
100 – 27
= 73
He should get 73 dollars change.
627:
Solve the problem.
A cake costs 22 dollars. A carton of milk costs 11 dollars.Gina bought a cake and a carton of milk. She gave the shopkeeper a 50-dollar note. How much change should she get?
50 – (22 + 11)
= 50 – 33
= 17
She should get 17 dollars change.
628:
Solve the problem.
Lily bought two kinds of food below. She paid 100 dollars and she got 60 dollars change.
She bought ( / ) and ( / ).
Number sentence: 100 – (18 + 22) = 60
629:
Solve the problem.
Suppose you have 40 dollars and you can buy any two kinds of food below. Which two kinds of food do you buy each? How muchmoney is left?
I buy ( / / / ) and
( / / / ).
dollars are left.
Accept any reasonable answers
630:
Solve the problem.
Mr. Chan’s salary is 7800 dollars. He spent 5298 dollars on rent and 639 dollars on food. How muchmoney is left?
7800 – (5298 + 639)
= 7800 – 5937
= 1863
1863 dollars is left.
631:
Solve the problem.
Mrs. Wong has 8723 dollars in her bank account. She withdrew 2945 dollars and later she deposited a cheque of 3678 dollars. How much does she have in her account now?
8723 – 2945 + 3678
= 5778 + 3678
= 9456
She has 9456 dollars in her
account now.
632:
Solve the problem.
Misss Ho has 1275 dollars cash. After withdrawing 8450 dollars from the bank, shebought a dress with 986 dollars. How much does she have now?
1275 + 8450 – 986
= 9725 – 986
= 8739
She has 8739 dollarsnow.
633:
Solve the problem.
Mr. Kong’s salary is 1385 dollars fewer than Miss Wu’s and is also 2165 dollars fewer than Mr. Chu’s. The salary of Mr. Chu is 8215 dollars. How much is her salary?
8215 – 2165 + 1385
= 6050 + 1385
= 7435
Miss Wu’s salary is 7435 dollars.
634:
Solve the problem.
Each adult ticket and each elder ticket for the cinema are 55 dollars and 30 dollars respectively. What is the total cost of two adult tickets and one elder ticket?
55 2 + 30
= 110 + 30
= 140
The total cost is 140 dollars.
635:
Solve the problem.
There are 8 students in each harmonica class. In a learning centre, there are 7 classes and 3 tutors. How many students and tutors are there in thelearning centre altogether?
8 7 + 3
= 56 + 3
= 59
There are 59 people altogether.
636:
Solve the problem.
Henry has 56 dollars. Mary has 6 times that of Henry’s. How much do they have altogether?
56 + 56 6
=56 + 336
=392
They have 392 dollarsaltogether.
637:
Solve the problem.
A cheese cake costs 20 dollars. A piece of wheat bread costs 6 dollars. What is the total cost to buy 3 cheese cakes and 7 pieces of wheat bread?
20 3 + 6 7
= 60 + 42
=102
The total cost is 102 dollars.
638:
Solve the problem.
A carton of milk costs 19 dollars. Mother wants to buy 4 cartons but she only has 65 dollars. How much more does she need?
19 4 – 65
= 76 – 65
=11
She needs 11 dollars more.
639:
Solve the problem.
Kelly has 20 dollars. James’ money is 2 times that of Kelly’s. James just spent 12 dollars. How much does he remain?
20 2 – 12
=40 – 12
=28
James remains 28 dollars.
640:
Solve the problem.
A can of coke costs 6 dollars. 6 cans cost 30 dollars only. How much is saved to buy 6 cans of coke?
6 6 – 30
=36 – 30
=6
6 dollarsis saved.
641:
Solve the problem.
A tin of biscuits contains 150 pieces. Tom eats 6 pieces each day. How many pieces are left after two weeks?
150 – 6 14
= 150 – 146
= 150 – 84
=66
There are 66 pieces left.
642:
Solve the problem.
Susan has 42 marbles.The number of Jim’s marbles is 3 times that of Susan’s. Dick has 13 fewer marbles than Jim. How many marbles does Dick have?
42 3 – 13
= 126 – 13
= 113
Dick has 113 marbles.
643:
Solve the problem.
There are 45 pupils in class 3A with 23 girls. There are 3 more boys in class 3B than in class 3A. How many boys are there in class 3B?
45 – 23 + 3
= 22 + 3
= 25
There are 25 boys in class 3B.
81:
Solve the problem.
A box of ice cream costs 23 dollars. Sammy bought 3 boxes and she paid 100dollars. How much change should she get?
100 23 3
= 100 69
= 31
She should get 31 dollars change.
82:
Solve the problem.
A box of ice cream costs 37 dollars. Each box is 5 dollars cheaper now. Winnie buys 3 boxes. How much should she pay altogether?
(37 5) 3
= 32 3
= 96
She should pay 96 dollarsaltogether.
83:
Solve the problem.
165 mobile phones were sold in a shop last month. The number of mobile phones sold this month is 3 times that of last month. How many more mobile phones were sold this month than last month?
165 3 165
= 495 165
= 330
330 more mobile phones were
sold this month than last month.
84:
Solve the problem.
Henry has 8 one hundred-dollar notes. He bought a radio with 768 dollars. How much does he still have?
100 8 768
= 800 768
= 32
He still has 32 dollars.
86:
Solve the problem.
John took part in the 800 m race. Jimmy took part in another race. The distance of the race that Jimmy took part is 3 times and 600 m longer than that Johntook part. How long is the race that Jimmy took part?
800 3 + 600
= 2400 + 600
= 3000
John took part in the 3000 m race.
87:
Solve the problem.
A carton of distilled water contains 24 bottles.Now a bigger carton is used which can hold 5 more bottles. How many bottles of distilled water are there in 9 new cartonsaltogether?
(24 + 5) 9
= 29 9
= 261
There are 261 bottlesof distilled
water altogether.
88:
Solve the problem.
A school has planted 4 rows of pine trees with 15 trees in each row. The number of willow trees planted is 40 more than that of pine trees. How many willow trees are there?
15 4 + 40
= 60 + 40
= 100
There are 100 willow trees.
89:
Solve the problem.
Henry has 36 books. The number of Lily’s books is 3 times and 17 fewer than that of Henry’s. How many books does Lily have?
36 3 17
= 108 17
= 91
Lily has 91 books.
90:
Solve the problem.
Manson has 5 fifty-dollar notes. After spending 218 dollars on buying a plane model, how muchmoney was left?
50 5 218
= 250 – 218
= 32
32 dollars were left.
328:
Solve the problem.
A 5-day package tour to Thailand is 1388 dollars. There is a discount of 250 dollars for students. There is also a charge of 525 dollars for the tourist guide. Peter is a student. He wants to join this tour. How much should he pay altogether?
1388 – 250 + 525
= 1138 + 525
= 1663
He should pay 1663 dollars
altogether.
329:
Solve the problem.
The profit of a gift shop two days ago was 3756 dollars. The profit yesterday was 1210 dollars fewer than two days ago. The profit today is 2315 dollars more than yesterday. What is the profit today?
3756 – 1210 + 2315
= 2546 + 2315
= 4861
The profit is 4861 dollars today.
330:
Solve the problem.
The number of tourists from mainland China to Hong Kong in April is 5530 people. The number in May is 2563 more than that of April. The number in June is 1826 fewer than that of May. How many tourists from mainland China came to Hong Kong in June?
5530 + 2563 – 1826
= 8093 – 1826
= 6267
6267 tourists from mainland China
came to Hong Kong in June.
331:
Look at the picture and solve the problem.
What is the total cost of 2 hotdogs and 1 pack of potato chips?
82 + 6
=16 + 6
= 22
The total cost is 22 dollars.
332:
Look at the picture and solve the problem.
What is the total cost of 5 glasses of soft drinks and 1 box of fruit tarts?
5 5 + 12
= 25 + 12
= 37
The total cost is 37 dollars.
333:
Look at the picture and solve the problem.
Mother bought 6 hotdogs and she paid 100 dollars. How much change should she get?
100 – 8 6
= 100 – 48
= 52
She should get 52 dollars change.
334:
Look at the picture and solve the problem.
Peter bought 2 boxes of fruit tarts and he paid 30 dollars. How much change should he get?
30 – 12 2
= 30 – 24
= 6
He should get 6dollars change.
335:
Solve the problem.
Paula has 57 stamps. The number of Mary’s stamps is 3 times that of Paula’s. How many more stamps does Mary have than Paula?
57 3 – 57
= 171 – 57
= 114
Mary has 114 more stamps than
Paula.
336:
Solve the problem.
Kin and Ann make some dumplings. Ann made 12 pieces. Thenumber of dumplings made by Kin is 4 times that made by Ann. How many dumplings did they make altogether?
12 + 12 4
= 12 + 48
= 60
They made 60 dumplings altogether.
337:
Solve the problem.
15 kiwi fruit are packed in each bag. 4 more kiwi fruit areput into each bag now. Ms Lee bought 3 bags of kiwi fruit. How many kiwi fruit are there altogether?
(15 + 4) 3
= 19 3
= 57
There are 57 kiwi fruits altogether.
339:
Solve the problem.
A story book costs 18 dollars. Mary wants to buy 5 copies but she gets only 80 dollars. How much more does she need?
18 5 – 80
= 90 – 80
= 10
She needs 10 dollars more.
340:
Solve the problem.
32 children joined Jane’s birthday party. There are 5 pizzas in the party.If each pizza is divided into 6 pieces and each child is given one piece, how many more pieces of pizza are needed?
32 – 6 5
= 32 – 30
= 2
2 more pieces of pizza are needed.
341:
Solve the problem.
The cost of buffet is 128 dollars for an adult and 88 dollars for a child. Mr. Wong and his two children go for the buffet. How much should he pay altogether?
128 + 88 2
= 128 + 176
= 304
He should pay 304 dollars
altogether.