Adding and Subtracting

Adding

100

10+10=

What is 20

200

7+8=

What is 15

300

9+7=

What is 16

400

8+8=

What is 16

500

10+11=

What is 21

Subtracting

100

10-2=

What is 8

200

14-7

What is 7

300

 12-6=

What is 6

400

15-7

What is 8

500

What is 19-9

What is 10

2's

100

2, 4, ?

What is 6

200

10,12,?

What is 14

300

7,9,?

What is 11

400

15,17,?

What is 19

500

20,22,?

What is 24

5's

100

5,10,?

What is 15

200

15,20,?

What is 25

300

50, 55, ?

What is 60

400

70,75,?

What is 80

500

100, 105, ?

What is 110

10's

100

10, 20, ?

What is 30

200

60, 70, ?

What is 80

300

90, 100, ?

What is 110

400

65, 75, ?

What is 85

500

105, 115, ?

What is 125