Chapter 2: Adding and Subtracting Whole Numbers and Money
2-1 Mental Math: Adding: Seatwork:
Add: Try to use mental math
37 + 55 = ______73 + 49 = ______
98 + 22 = ______10 + 99 = ______
86 + 10 = ______55 + 55 = ______
63 + 63 = ______72 + 39 = ______
38 + 46 = ______17 + 91 = ______
Problem Solving
Last week a pie shop sold:
• 12 cherry pies
• 6 pumpkin pies
• 18 apple pies
How many pies were sold altogether? ______
Andre wants to put 63 of his stickers in a book.
• He wants stickers on more than 1 page.
• He wants more than 1 sticker on each page.
• He wants the same number of stickers on each page.
Show 2 different ways Andre could put his stickers in the book. Put the answers
in the spaces provided.
_____ pages with _____ stickers on each page
_____ pages with _____ stickers on each page
2-1 Mental Math: Adding: Homework: ______
Add: Try to use mental math
17 + 90 = ______91 + 98 = ______
73 + 46 = ______82 + 51 = ______
83 + 48 = ______97 + 24 = ______
69 + 85 = ______35 + 74 = ______
78 + 93 = ______87 + 34 = ______
Problem Solving
1. Tim bought 2 paintbrushes that each cost $2.50. He also bought 1 bucket that cost $1.50.
How much did Tim pay in all? ______
2. What is three thousand fourteen and eight-tenths written in standard form?
______
3. A store sent out 5,221 announcements last year. Which shows the word form of 5,221?
A five thousand twenty-one
B fifty thousand two hundred twenty-one.
C fifty-two thousand twenty-one
D five thousand two hundred twenty-one
4. At the school carnival, the principal selected 4 tickets for a door prize. The ticket numbers are shown below.
79342
79432
81254
81204
Order the ticket numbers from least to greatest. ______
______
2-2 Mental Math: Subtracting: Seatwork:
Subtract: Try to use mental math
32 − 15 = ______72 − 63 =______72 − 15 = ______
70 − 17 = ______95 − 61 = ______59 − 28 = ______
84 − 51 = ______90 − 56 = ______78 − 49 = ______
36 − 20 = ______70 − 28 = ______74 − 16 = ______
Problem Solving
1. Rob’s car had 16 gallons of gas. On a 55 mile drive, the car used 3 gallons. Which shows how to find how many gallons were in the car after the drive?
A 16 + 3 B 55 + 3 C 16 – 3 D 55 – 3
2. The pictograph below shows the number and kinds of birds in a pet shop.
How many finches are in the pet shop?
A 4 B 8 C 12 D 16
Jeff bought 62 ice cream cones. He ate 15 ice cream cones. What does Jeff have now? (besides a stomach ache?
______
2-2 Mental Math: Subtracting: Homework: ______
99 − 25 = ______88 − 61 = ______91 − 78 = ______
88 − 60 = ______53 − 49 = ______68 − 26 = ______
98 − 14 = ______70 − 47 = ______72 − 45 = ______
88 − 39 = ______80 − 46 = ______62 − 10 = ______
Problem Solving
Sam has 52 baseball cards. His brother takes away 25 of his cards. How many cups does Sam have left?
Scot has 85 M & Ms. Scot ate 33 of them. How many M & Ms does Scot have left?
2-3 Estimating: Seatwork:
Complete the Following Problems Using Estimation
1. 365 à ______2. 1,429 à ______
+ 528 à + ______+ 8,293 à + ______
______
3. 762 à ______4. 8,925 à ______
- 376 à - ______- 4,077 à - ______
______
5. 919 à ______6. 3,252 à ______
+ 191 à + ______+ 2,293 à + ______
______
7. 27,832 à ______8. 38,734 à ______
- 18,376 à - ______- 34,577 à - ______
______
9. 32,655 à ______10. 121,629 à ______
+ 35,258 à + ______+ 48,347 à + ______
______
2-3 Estimating: Homework: ______
Complete the Following Problems Using Estimation
1. 438 à ______2. 919 à ______
+ 85 à + ______+ 191 à + ______
______
3. 787 à ______4. 813 à ______
- 222à - ______- 290 à - ______
______
5. 6,742 à ______6. 4,374 à ______
+ 884 à + ______- 1,614 à - ______
______
7. 28,807 à ______8. 75,295 à ______
- 3,499 à - ______- 9,750 à - ______
______
9. 75,629 à ______10. 27,832 à ______
+ 3,331 à + ______+ 18,445 à + ______
______
2-4 Overestimates & Underestimates: Seatwork:
Estimate each sum or difference. Then, if possible, tell if your estimate is an over estimate or underestimate.
1. / 365 à / 400 / 2. / 335 à / 300+ 568 à / + 600 / + 218 à / + 200
1,000 / 500
overestimate / underestimate
3. / 722 à / 4. / 267 à
- 143 à / + 488 à
5. / 888 à / 6. / 667 à
+ 451 à / - 251 à
7. / 923 à / 8. / 332 à
- 321 à / + 449 à
9. / 14,255 à / 10. / 15,555 à
- 12,333 à / + 18,777 à
Curtis needs $275 for a new surfboard. He has saved $122. He earned $82 from work. About how much more does Curtis need? Tell whether your estimate is an overestimate or an underestimate. ______
2-4 Overestimates & Underestimates: Homework:
Estimate each sum or difference. Then, if possible, tell if your estimate is an over estimate or underestimate.
1. / 365 à / 400 / 2. / 335 à / 300+ 568 à / + 600 / + 218 à / + 200
1,000 / 500
overestimate / underestimate
3. / 886 à / 4. / 723 à
- 357 à / + 445 à
5. / 635 à / 6. / 543 à
+ 343 à / - 132 à
7. / 785 à / 8. / 751 à
- 362 à / + 189 à
9. / 29,255 à / 10. / 33,321 à
- 12,333 à / + 15,434 à
Shemp needs $467 for a new bike. He has saved $213. He earned $197 from work. About how much more does Shemp need? Tell whether your estimate is an overestimate or an underestimate. ______
2-5 Adding Whole Numbers & Money: Seatwork:
Add:
1. / 237 / 2. / 7,777 / 3. / $ 10.85+ / 355 / + / 625 / + / 65.30
______/ ______/ ______
4. Last week, Andrew and Jennifer went on a road trip. Andrew drove 7,966 miles and Jennifer drove 1,779 miles. Overall, how many miles did they travel?
______
5. / 9,321 / 6. / 43,901 / 7. / $27,832+ / 5,939 / + / 7,899 / + / 46,079
______/ ______/ ______
8. A team of engineers built a dam over a large river. In the process, they created a lake covering 7,535 hectares of farmland, as well as 1,925 hectares of forest. How many hectares does the lake cover?
______
9. / 478,395 / 10. / 7,243,526 / 11. / $ 189.65+ / 855,268 / + / 1,968,978 / + / 575.89
______/ ______/ ______
2-5 Adding Whole Numbers & Money: Homework:
Add:
1. / 459 / 2. / 4,444 / 3. / $ 13.72+ / 577 / + / 281 / + / 34.26
______/ ______/ ______
4. A crayon company recently changed its labels. It currently has 2,965 crayons with the old label and 1,532 crayons with the new label. How many crayons does the company have in stock?
______
5. / 6,098 / 6. / 38,723 / 7. / $25,123+ / 2,626 / + / 5,795 / + / 54,678
______/ ______/ ______
8. Before December, customers buy 5,698 ear muffs from the mall. During December, they buy 6,387 more, and there are none left. In all, how many ear muffs do the customers buy?
______
9. / 354,926 / 10. / 3,427,256 / 11. / $ 311.87+ / 275,450 / + / 4,524,5374 / + / 353.67
______/ ______/ ______
2-6 Column Addition: Seatwork:
1. / 286 / 2. / $ 26.07 / 3. / 24219 / 4.91 / 206
+ / 83 / + / 19.38 / + / 817
______/ ______/ ______
4. Mr. Adlin bought 342 bananas on Tuesday. He bought 1,246 bananas on Wednesday. He then bought 6,734 bananas on Thursday. How many does Mr. Adlin have now?
______
5. / 69 / 6. / $20.32 / 7. / 2,844358 / 19.75 / 3,916
97 / 6.42 / 104
+ / 523 / + / 3.18 / + / 2,753
______/ ______/ ______
8. Last year at Booneville's airport, 3,171 passengers landed in June. 6,060 passengers landed in July. 5,633 landed in August. In all, how many passengers landed in Booneville last year?
Crossing the River A farmer is trying to cross a river. He is taking with him a rabbit, carrots and a fox, and he has a small raft. He can only bring 1 item a time across the river because his raft can only fit either the rabbit, the carrots or the fox. How does he cross the river. (You can assume that the fox does not eat the rabbit if the man is present, you can also assume that the fox and the rabbit are not trying to escape and run away)
2-6 Column Addition: Homework:
Add:
1. / 782 / 2. / $ 56.93 / 3. / 2,154297 / 78.23 / 8,543
+ / 11 / + / 50.00 / + / 3,478
______/ ______/ ______
4. The Mr. Kardasis has 8,587 PokeMon cards, and 9,549 Yugioh cards, and 3,368 Digimon cards. Together, how many cards does he have?
______
5. / 613 / 6. / $275.25 / 7. / 1,714824 / 36.19 / 3,923
176 / 1.05 / 104
+ / 202 / + / 1.10 / + / 3,753
______/ ______/ ______
8. A famous singer has a fan club with members all around the universive. Among its members are 9,924 Vulcans and 1,709 Klingons and 3,236 Romulans. How many members does the fan club have?
______
Math Riddle: How can you add eight 8's to get the number 1,000? (only use addition) The key to this math riddle is realizing that the one place must be zero,.
888 +88 +8 +8 +8 =1,000
2-7 Subtracting Whole Numbers & Money: Seatwork:
Subtract:
Complete the Following Problems
1. / 1,234 - 365à / 1234 / 2. / 33.50 - 2.18à / 33.50Restack à / - 365 / Restack and line up. / + 2.18
and line up / 869 / NOTE THE DECIMAL / 31.32
3. / 756 -421 = / 4. / $89.32 - $5.32=
5. / 4,221 - 343 = / 6. / $89.34 - $9.32 =
7. / 985 - 325 = / 8. / $25.36 - $3.62 =
9. / 21,552 - 12,333 / 10. / $45.12 - $2.36=
Mr. Walther spent $ 13.58 on a Tickle Me Elmo doll. Mr. O’Hara spent $ 6.41 on a Cookie Monster figure. How much more did Mr. Walther pay?
2-7 Subtracting Whole Numbers & Money: Homework:
Subtract:
Complete the Following Problems
1. / 365 + 1,234 à / 365 / 2. / 3.35 + 21.80à / 3.35Restack à / + 1,234 / Restack and line up. / + 21.80
and line up / 1,599 / NOTE THE DECIMAL / 24.15
3. / 886 -357 = / 4. / $ 72.3 - $ 4.45=
5. / 343 - 65 = / 6. / $ 543.13 – $ 57.22=
7. / 7,856 - 362 = / 8. / $ 751.22 - $ 18.92 =
9. / 22,925 - 12,131 = / 10. / $ 15.43 - $ 8.91 =
Mr. Adlin ran a race in 19.23 seconds. Mr. O’Hara finished in 32.23 seconds. What was the difference between their times?
2-9 Looking For Patterns: Seatwork:
Write a rule that describes the patterns. Then draw the next three figures in that pattern.
Directions: Write the next three terms in the patterns below
2-9 Looking For Patterns: Seatwork:
Fill in the missing numbers in the sequences below:
26,22,18,______10, ______
36,30,24,______12, ______
7,______21,28, ______, 42
12,24,36,______60, ______
Fill in the Empty Boxes
2-9 Looking For Patterns: Homework:
Directions: Write the next three terms in the patterns below
Draw the next figure(s) in the patterns below.
2-9 Looking For Patterns: Homework:
Fill in the missing numbers in the sequences below:
45,40,35,______25, ______
16,24,32,______48, ______
18,______36,45, ______, 63
2,4, 8,______32, ______
Use the table to answer the questions below.
2-11 Matching Words with Number Expressions: Seatwork:
Remember that Parentheses ( )tell which
operation to do first in a number expression
Choose the correct number expression that matches the words. Then solve.
1. Carly had 40 stickers. She gave out 8 on Monday and 6 on Tuesday.
(40 – 8 ) – 6 or 40 – (7- 5) answer: ______
2. Mr. O. made 22 Tikis in 2011. He sold 5 in March and 4 more in April.
22 – (5 + 4) or (22 - 5) + 4 answer: ______
3. Lorenzo had 30 stickers. He gave out 3 on Monday and 4 on Tuesday.
(30 – 3 ) – 4 or 30 – (3 - 4) answer: ______
4. Erik earned $13. Then he earned $7. He spent $5
13 – (7 + 5) or (13 + 7) - 5 answer: ______
5. Kallie had 36 flowers. She got 9 more . She then gave Lily 10.
(36 – 9 ) – 10 or (36 + 9) - 10 answer: ______
6. Shane has 24 hats. He gave 3 to Matt and 7 to Zach.
24 – (3 + 7) or (22 - 7) + 3 answer: ______
7. 15 Representatives from Pennsylvania and 2 from Maine agreed to support a Bill. Then 5 Representatives from New Jersey joined them. How many supported the Bill
(15 +2) - 5 or (15 + 2 ) + 5 answer: ______
2-11 Matching Words with Number Expressions: Homework:
Remember that Parentheses ( )tell which
operation to do first in a number expression.
Choose the correct number expression that matches the words. Then solve.
1. Anna had 28 stickers. She gave out 7 to Olivia and 3 to Mrs. Lyford.
(28 – 7 ) – 3 or 28 – (7- 3) answer: ______
2. Annaliese made 22 pictures. She sold 8 in June and 7 more in July.
22 – (8 - 7) or (22 - 8) - 7 answer: ______
3. Avery had 25 erasers. He gave out 6 on Monday and 7 on Tuesday.
(25 + 6 ) +7 or 25 – (6 + 7 ) answer: ______
4. Kendall met3 Phillies. She met 6 Eagles . She met 5 Flyers.
3 + (6 -5) or (6 + 3) +5 answer: ______
5. Lily had 19 pencils. She got 5 more . She then gave away 9 to Stephanie.
(19 + 5 ) – 9 or (19 + 9) - 5 answer: ______
6. Christian has 13 mints. He gave 4 to Carli and 3 to Syndey.
13 – (4 -3 ) or 13 – (4 + 3 ) answer: ______
7. Illinois has 18 Representatives. Maine has 2 Representatives. Oklahoma has 5 representatives. Michigan has 15 Representatives. How many more Representatives does Illinois have than Maine and Oklahoma combined?