Lesson 15 Review

subtracting two-digit and three digit numbers

100

37-23

14

200

56-29

27

300

subtract 24 from 53

29

400

321-234

87

500

8,146-256

7,890

missing addends

100

x+5=10

x=5

200

7+x=20

x=13

300

13+x=25

x=12

400

x+74=98

x=24

500

28+x=54

x=26

missing number in subtraction

100

15-K=9

K=6

200

C-8=4

C=12

300

x-12=24

X=36

400

72-x=24

x=48

500

C-128=98

c=226

addition

100

77+99

176

200

What do we call the answer to an addition problem?

sum

300

438+148

586

400

Maria saw some grasshoppers at the park. She saw 14 grasshoppers at home. Altogether, she saw 22 grasshoppers. How many grasshoppers did she see at the park?

8 grasshoppers

500

5,438+389

5,827

random

100

use words to write the number 223

two hundred twenty-three

200

complete the pattern: 1,2,4,7,11,___

16

300

Compare -3 to -5

-3>-5

400

What are the four months of the year that have 30 days?

September, April, June, November

500

If c=6 and C+B=10, then what does B=?

B=4