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Addition
Counting
Subtraction
100

What does 3+7=

10

100

Find the missing number

1, 2, _, 4, 5, 6

3

100

10-5=

5

200

What does 7+2=

9

200
Find the missing number 

_, 7,8,9,10

6

200

8-7=

1

300

What does 2+6=

8

300

Find the missing number 


1, 2, 3, 4, 5, 6, 7, 8, 9, _

10

300

5-3=

2

400

What does 1+3=

4

400

Find the missing number


3, 4, 5, 6, 7, _, 9

8

400

8-4=

4

500
What does 5+1=

6

500

Find the missing number(s)


_, 1, 2, 3, 4, _, 6, 7

0 & 5

500

15-8=

7