Sums and Differences Within 100

Make A Ten

100

18+4=

18+2=20

20+2=22

200

19+3=

19+1=20

20+2= 22

300

38+7=

38+2= 40

40+5=45

400

39+4=

39+1=40

40+3=43

500

58+7=

58+2=60

60+5=65

Take From Ten..Teens

100

12-9=

10-9=1

1+2=3

200

13-9=

10-9=1

1+3=4

300

11-7=

10-7=3

3+1=4

400

14-6=

10-6=4

4+4=8

500

16-7=

10-7=3

3+6=9

Take From Ten..Multiples

100

20-9

10-9=1

10+1=11

200

30-9=

10-9=1

20+1=21

300

20-8=

10-8=2

10+2=12

400

50-6=

10-6=4

40+4=44

500

90-5=

10-5=5

80+5=85

Word Problems

100

Oni had 8 pencils and bought 5 more. How many pencils does Oni have altogether? 

Oni has 13 pencils. 

200

There were 28 students at recess. A group of 7 students came outside to join them. How many students are there now? 

There are 35 students there. 

300

Seleylah has 70 paper clips. She gives 6 away. How many paper clips does Seleylah have left? 

10-6=4

60+4=64

400

Mrs. Smith had 17 cupcakes. The scholars ate some. Nine cupcakes were left. How many cupcakes did the children eat? 

10-9=1

1+7=8

500

Tony has 16 trucks. He gives Matthew some. Seven trucks are left. How many trucks did Tony give Matthew? 

10-7=3

3+6=9

10 Less

100

10 less than 48 is

38

200

10 less than 53 is

43

300

10 less than 78 is

68

400

10 less than 86 is

76

500

10 less than 99 is 

89