Complete 2 pages (page 21 & 22) within 5 minutes with > 95 ...

? Mental Math Worksheets. Unauthorized copying or reproduction of this worksheet is strictly prohibited.

Level 5

Unit 3.1

Add Numbers Using 20 to 39 with Regrouping

Name: ..................................................................

Complete 2 pages (page 21 & 22) within 5 minutes with > 95% accuracy.

Time Taken: ......... Total Score: ..........

1. Add the following.

1

1

1

a. 28

b. 38

c. 29

+ 13 11 + 16 14 + 13

41

4

2

d. 25 + 18

e. 36 + 16

f. 33 + 17

g. 27 + 13

h. 35 + 17

i. 23 + 17

j. 34 + 16

k. 38 + 14

l. 39 + 18

m. 31 + 19

n. 38 + 44

o. 39 + 12

p. 37 + 18

L.5, Page 21

Level 5

Unit 3.1 Add Numbers Using 20 to 39 with Regrouping

2. Fill in the missing number.

a. 36 + 14 5

b. 37 + 15 2

c. 33 + 7

50

? Mental Math Worksheets. Unauthorized copying or reproduction of this worksheet is strictly prohibited.

d. 24 + 9

43

e. 9 + 17 56

f. 7 + 15 42

3. Solve the following problems.

Extra

i. Kim buys 36 gifts. Jim buys 15 gifts. Which number sentence shows the story?

a. 36 + 36 = 72 b. 15 + 15 = 30

c. 36 + 15 = 51 d. 51 + 15 = 66

ii. Sally has a rope that is 37 m long. She buys a rope that is 13 m long. How long are the two ropes together?

Sally has ____ m of rope altogether.

L.5, Page 22

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