Number Sense Practice Examples

GRADE 2

Number Sense Practice Examples

Aligned to the Common Core State Standards and PARCC style tasks

Attendees at the FEA Dec. 9, 2015 workshop have permission from the author to use this material with their students.

This material should not be distributed to others.

Thank you.

These are draft copies now published in Barron’s Educational Series of workbooks titled,

“Grade 2 Test Practice for Common Core”

Judith T. Brendel, author

and workshop presenter

2.NBT.1 Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones. UNDERSTAND 3-DIGIT NUMBERS

1) What is the sum of 210 + the shaded squares below?
Answer: ______/ 2) What is the sum of all the shaded parts below?
100 / 100
Answer: ______
3) Add the hundreds.

1. 600 + 200 = ______
2. 100 + 300 = ______
3. 500 + 300 = ______
4. 400 + 500 = ______

/ 4) Add
5 0 0
+ 1 0 0 / 5) Add
7 0 0
+ 2 0 0
6) Add
3 0 0
2 0 0
1 0 0 / 7) Add
5 0 0
1 0 0
2 0 0 / 8)
The local food store received hundreds of cans of vegetables as shown below. How many cans did they receive in all?
200 cans of carrots
300 cans of corn
200 cans of peas
_____ cans in all
9)
Show the sum of 324 and 563 in the number chart below.
Hundreds / Tens / Ones
+
3 2 4 + 5 6 3 = ______/ 10)
Show the difference between 438 and 305 in the number chart below.
Hundreds / Tens / Ones
-
438 – 305 = ______
11) Which number below has
6 hundreds, 4 tens and 3 ones?

1. 346
2. 436
3. 634
4. 643

/ 12) Which number below is
seven hundred six?

1. 760
2. 706
3. 76
4. 076

13) How many tensare in the tens place in 538?
5 3 8 0 / 14) How many onesare in the ones place in 638?
6 3 8 0
15) Which place value is underlined?
8 2 4

1. ones
2. tens
3. hundreds

/ 16) Circle the digits that represent hundreds.
340 68 743
802 199 47
17) Ray’s father has 129 plants in his garden. Billy’s father has 230 plants in his garden.
Ray says his father has more plants because 9 is bigger than 2.
Is Raycorrect? Yes ___ No ___ Explain:
18) Write these numbers in order from smallest to largest.
423 450 429 407 419
______

2.NBT.2

SKIP COUNT within 1000 by 5s, 10s and 100s

SAMPLE SUBTRACTION
Use a number line to help.
9 – 3 = ? 9 – 3 = 6

0 1 2 3 4 5 6 7 8 9 / SAMPLE ADDITION
Use a number line to help.
30 + 40 = ?
30+10 + 10 + 10 + 10 =70

0 10 20 30 40 50 60 70 80 90

• 1) What two numbers are next?

25 30 35 40 ? ?
15 20 25 30 35 40 45 50 55 60
Answer: ____ and ____ /

• 2) What number is next?

60 70 80 90 ?
60 / 70 / 80 / 90 / ?

91 92 95 100
3)
W What numbers are missing?
70 75 ___ 85 ___ 95 100
A.76and 77
B.76 and 86
C.80and 86
D.80 and 90 /

• 4)
• What numbers are missing?

65 60 ______45 40 35
A. 59 and 49
B. 75 and 70
C. 55 and 50
D. 50 and 40
5) What number is missing?
200 300 400 ? 600
A.401
B.405
C.450
D.500 /

• 6) What number is missing?

440 540 ? 740 840
A. 542
B. 650
C. 640
D. 650
7) What is the sum of 200 + 500?
Answer: ______/

• 8) What is the sum of 150 + 100?

Answer: ______
9) What is the difference?
850 – 200 = ______/ 10) What is the difference?
1000 – 300 = ______
11)
Wade had 205 baseball cards. He gave 100 to his brother.
How many baseball cards does Wade have left?
Wade has ______baseball cards left. / 12)
Ashley’s teacher had 350 books on the library shelves. She used 50 books for her students.

• How many books are still on the library shelves?
• ______books are still on the library shelves.

13)
Max had 5 hits in his first ball game. He had 5 hits in his second game and 5 hits in his next game. How many hits did he have in his three games?
Max had ______hits in his three games. /

• 14)
• Shayla scored 70 points on her first math test. She scored 10 points more on her second test and 10 points more on her third test. How much did she score on her third test?
• Shayla scored ______points on her third test.

2.NBT.3 Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

READ and WRITE NUMBERS to 1000

1)
Which says two hundred fifty-six?

1. 265
2. 562
3. 256
4. 20056

/ 2)
Which is equal to eight hundred twenty-five?

1. 8205
2. 825
3. 80025
4. 810025

3)
520 =

1. 500 + 20
2. 50 + 200
3. 5 + 200
4. 200 + 50

/ 4)
605 =

1. 600 + 50
2. 60 + 5
3. 600 + 50
4. 600 + 5

5)
Show the number five-hundred thirty-two in the number chart below.
Hundreds / Tens / ones
How many tens are in the number five-hundred thirty-two?
Answer: ______/ 6)
Complete the chart to show
670 + 215
Hundreds / Tens / ones
+
8 / 8 / 5
Is the sum 885? Yes___ No___
7)
Draw lines to match the names with the numerals.
Three hundred twelve / 2 0 9
Two hundred ninety / 6 1 9
Six hundred nineteen / 3 1 2
Two hundred six / 9 4 2
Nine hundred forty-two / 2 9 0
6 9 1
2 6 0
2 0 6
8)
Write the number five-hundred six.
Answer: ______/ 9)
Write the number
seven-hundred eighty.
Answer: ______
10)
How many tens are in the tens place in the number 405?
Answer: ______/ 11)
How many ones are in the ones place in the number 596?
Answer: ______
12)
How many tens are in the tens place in the number 4 5 2 8 ?
There are _____ tens in the number above.
13)
What number comes after five-hundred? Answer: ______

Name ______Date: ______

2.NBT.4 Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using > = and < symbols to record the results of comparisons.

1)
890 920
> = < / 2)
401 396
> = <
3)
468 ? 472
> = < / 4)
632 629
> = <
5)
Use words to tell how you know which number is bigger.
509 or 609 ? / 6)
Use words to tell how you know which number is smaller.
950 or 918 ?
7)
Draw a model to show which number is bigger.
12 or 21
Which number is bigger? _____ / 8)
Draw a model to show which number is smaller.
19 or 15
Which number is smaller? _____
9)
Miah has 28 cards, Ella has 19 cards.
Who has fewer cards? ______has fewer cards.
Explain how you know.
10)
Sydney counted 280 buttons in her grandmother’s sewing box. She counted 210 cans of paint in her grandfather’s paint store.
Are there more buttons or more cans of paint?
There are more ______.
Explain how you know.
11)
Carlito says that 600 + 200 has the same value as 500 + 300.
Is he correct? Yes ____ No ____
Explain how you know.

2.NBT.5 Use place value understanding and properties of operations to add and subtract. Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.

FLUENTLY ADD and SUBTRACT within 100

SAMPLE SUBTRACTION
Tens / Ones
3 / 15
4 / 5
- / 6
3 / 9
/ 1)
Tens / Ones
7 / 3
- / 8
/ 2)
Tens / Ones
9 / 0
- / 4
3)
75 – 16 = / 4)
84 – 26 = / 5)
6 3
- 3 5
6)
34
- 7 / SAMPLE ADDITION
Tens / Ones
1
4 / 9
+ / 6
5 / 15
Answer: 55 / 7)
Tens / Ones
7 / 4
+ / 8
Answer: ______
8)
35 + 6 =

1. 95
2. 40
3. 41
4. 356

/ 9)
43 + 9 =

1. 439
2. 46
3. 50
4. 52

/ 10)
90 – 10 + 20 =

1. 100
2. 80
3. 70
4. 60

11) Do mentally.
35 – 5 + 6 =

1. 356
2. 306
3. 360
4. 36

/ 12) Do mentally.
46 – 3 + 10 =

1. 59
2. 56
3. 53
4. 463

/ 13) Do mentally.

• 58 – 8 = ______

• 74 – 4 = ______

• 54 – 50 = ______

14)
100 – 98 + 2 = ____ / 15)
40 – 20 + 30 = ____ / 16)
85 – 80 + 10 = _____
17)
Jeffrey had 22 mini cars, he gave 2 to his little brother. His father then bought him 3 more. How many mini cars does Jeffrey have now?
Answer: Jeffery now has ______mini cars. / 18)
66 – 11 + 10 =
Answer: ______
19)
Julian drove with his mom to go shopping. They drove 20 miles to one store, then 6 miles to the next store, then 26 miles home.
How many miles did they drive in all?
Answer: They drove______miles in all. / 20)
50 + 20 – 6 =
Answer: ______
21)

• 12+ 12 + 12 = ______

• 23 + 23 + 23 = ______

/ 22)
15 + 15 + 15 =
Answer: ______

2.NBT.6 Add up to four two-digit numbers using strategies based on place value and properties of operations.

ADD up to four 2-DIGIT NUMBERS

1)
Annie loves to read. She has 12 books about animals.
She also has 14 mystery books and 15 books about different countries.
How many books does she have in all?
31 39 41 42 / 2)
Anniealso likes to shop. She went shopping with her mother for a party.
They bought 24 paper plates, 18 paper cups and 12 cans of juice.
How many items did they buy in all?
44 48 53 54
3)
30 + 45 + 20 =
77 95 105 140 / 4)
20 + 14 + 20 + 14 =
56 58 68 70
5)
Eliza says it is easy to add these four numbers. 20 + 12 + 30 + 7

• Why are they easy to add?

• What is the sum of these numbers? ______

6)
Eliza’s brother Johnnie says some numbers are easy to add and some are not. He says it is easy to add 13 + 41 + 11 + 43

• Why are these easy to add?

• What is their sum? ______

7)
Johnnie says it is harder to add 56 + 66 + 33 + 23

• Why are these harder to add?

• What is their sum? ______

8)
Johnnie’s teacher has 16 yellow balloons, 24 red balloons, and 18 blue ones.
How many balloons in all?
Johnnie’s teacher has ______balloons in all. / 9)
His school has 64 big windows and 38 small windows.
How many windows does the school have?
The school has ______windows in all.
10)
In the spring Eliza went to the zoo with Johnnie. The zoo had many different animals. It had 12 deer and 26 monkeys. It also had 38 birds.
How many animals and birds is this in all?
There were ______animals and birds in all.
11)
100 + 20 + 500 + 60 =
Answer: ______/ 12)
92 + 8 + 64 + 36 =
Answer: ______
13)
30 + 22 + 30 + 44 =
Answer: ______/ 14)
25 + 25 + 50 + 75 =
Answer: ______

2.NBT.7 Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method.Understand that in adding or subtracting thee digit numbers, one adds or subtracts hundreds and hundreds, tens and tens ones and ones and sometimes it is necessary to compose or decompose tens or hundreds. and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method

ADD and SUBTRACT within 1000. Use MODELS; COMPOSE/DECOMPOSE.

1)
Each bar = 100
What is the answer in this subtraction problem?
-

1. 20
2. 200
3. 300
4. 600

/ 2)
Each bar = 100
What is the answer in this addition problem?
+

1. 70
2. 300
3. 700
4. 90

3)
Nicholas collects shells that he finds on the beach. He has 631 small white shells and 343 black shells. How many shells does he have in all?
(author’s note: include figure 2.NBT.7-3
6 hundreds squares + 3 tens and 1 one )
+ (author’s note: include 3 hundred squares + 4 tens and 3 ones)
(A) 874 (B) 974 (C) 668 (D) 288
4)
Which shows 402 + 200? Each = 100 ?
A)

B)
C)
D)
Authors note – use figure 2.NBT.7 – 4 above for A) B) C) D)
5)
800 + 50 = 400 + 400 +

1. 30 + 30
2. 20 + 30
3. 40 – 10
4. 40 + 20

/ 6)
800 = 1000 –

1. 300
2. 200
3. 400
4. 600

7)
1000 – 90 = 900 + 10
True ___ False ___ / 8)
250 + 250 = 1000 – 500
True ___ False ___
9)
5 6 0
- 1 3 8

1. 422
2. 622
3. 438
4. 430

/ 10)
7 0 5
- 1 3 2

1. 633
2. 673
3. 573
4. 533

CCSS.Math.Content.2.NBT.B.8Mentally add 10 or 100 to a given number 100–900, and mentally subtract 10 or 100 from a given number 100–900.

MENTALLY ADD 10 or 100 to a NUMBER

1) Adding 100:
Remember: 158 = 100 + 58
158 + 100 =
____ + 58 + ____ = ______ / 2) Adding 10:
Remember: 64 = 6 tens and 4 ones
64 = 60 + 4
How much does 64 + 10 equal?
64 + 10 = 60 + 4 + 10 = ______
3) Adding 100:
296 + 100 = ______/ 4) Adding 10:
520 + 10 = ______
5) Adding 100:
740 + 100 = 700 + 40 + ____
740 + 100 = ______/ 6) Adding 10:
50 + 10 = ______
82 + 10 = ______
7)
There are 234 students in the first grade. There are 100 more students in the fourth grade.
How many students are in the fourth grade?
234 + ______= ______/ 8)
Jerome’s mother has 830 dollars in her bank account. Today, she added 100 dollars more.
How many dollars are in her bank account now?
830 ( _) _____ = ______dollars
9)
350
+ 100 / 10)
100
+ 295 / 11)
238
+ 10 / 12)
564
+ 10
12)
There are 253 birds in the zoo’s big bird house. Last week 100 more birds were added.
How many bird are now in the zoo’s bird house?
______birds / 13)
Susan has 6 colored pencils. Her aunt gave her 10 more colored pencils as a birthday gift.
How many colored pencils does Susan have now?
______colored pencils
14)
Last week Carlito’s mom paid 203 dollars to fix their car. Today she paid another 100 dollars for new tires.
How much money did Carlito’s mom spend on their car?
She spent ______dollars. / 15)
Katlyn’s grandfather bought a new shirt for 32 dollars. He also bought socks for 10 dollars.
How much money did he spend for the shirt and socks?
He spent ______dollars.
16)
Mr. Henry’s second grade classroom has a library. In September it had 106 books. In October Mr. Henry added 10 more books.
How many books were in the classroom library then?
There are ______books in the classroom library now. / 17)
Jennifer made 15 dollars shoveling snow last week. Today she made another 10 dollars babysitting.
How much money did she make in all?
She made ______dollars in all.

CCSS.Math.Content.2.NBT.B.9Explain why addition and subtraction strategies work, using place value and the properties of operations.1

HOW DO YOU KNOW?

1)
Monica is teaching her little brother how to subtract. How should she explain how to subtract 10 from 320? Circle the letter that seems best.

1. Break up the 320 into 3 hundreds and 2 tens. Then you can subtract one ten from the 2 tens.

1. Break up the 320 into 3 hundreds and 20 ones. Then you can subtract the 2 tens from the 20 ones.

1. Just subtract 2 from the 3 in 320. It is easy.

1. Break up the 320 into 300 + 2. Then just take away the 2.

2) Nicholas and Louis have different ways of adding 923 and 45.
Nicholas’ plan: 923 = 900 + 20 + 3
45 = 40 + 5
Louis’ plan: 923 = 900 + 20 + 3
45 = 40 + 5
Which plan is correct? ______plan is correct.
3)
Gabriel and his cousin Weston are learning how to add big numbers.
They need to add 560 + 23.
Weston says: 560 + 23 = 790
Gabriel says: 560 + 23 = 583
Who is correct? ______
What did the other boy do wrong? / 4)
Tammy says it is easy to subtract 45 from 59.
She also says it is harder to subtract 45 from 52.
Why is that harder? What extra steps do you need to take to solve 52 - 45 ?
Explain or show why she is correct.

Performance-Based Task “C” Grade-2 Barron’s Practice workbook

JUAN and MARISSA GO SHOPPING

READ THE STORY BELOW. / THEN answer these questions.
Juan and his baby sister Marissa spent time on Saturday shopping with their mother and grandmother.
They left their house at 10 o’clock in the morning.
They drove to a shoe store and spent $ 25 on a pair of shoes for Juan.
They also bought four pairs of socks for Marissa. The four pairs of socks cost 8 dollars in all.
Grandma bought shoe polish that cost two dollars and a pair of slippers that cost 20 dollars. / 1) How much did Marissa’s four pairs of socks cost?
The 4 pairs of socks cost ______.
2) How much does one pair of those socks cost?
One pair of socks cost ______.
3) How much more did Juan’s shoes cost than Marrisa’s four pairs of socks?
Juan’s shoes cost 25 dollars
Marissa socks cost 8 dollars
Juan’s shoes cost _____ dollars more than Marissa’s socks.
Next, they stopped at the drug store for grandma’s pills. Grandma bought 1 bottle of pills and 4 bottles of vitamins.
All together she spent $ 20.
Juan’s mother bought some cards and spent $ 6.
She surprised Juan and Marissa and bought them a set of bubbles. The bubbles cost $3. / 4) How much money did they spend all together at the drug store?
Write the number sentence for this total.
____ (+) ____ (+) ____ = _____
All together they spent $ ______at the drug store.

Page 1 of 22 For use at FEA workshop Dec. 2015 permitted as/author: J. Brendel