+0, +1, Doubles, Doubles +1, Sums of 10

+0

100

1+0

1 

200

3+0

3

300

7+0=

 7

400

10+0

10

500

15+0

15

+1

100

7+1=

 8

200

5+1

6

300

14+1

15

400

16+1

17

500

99+1=

What is 100

Doubles

100

2+2

4

200

3+3

6

300

7+7

14

400

9+9

18

500

10+10

20

Doubles +1

100

3+4

7

200

4+5

9

300

5+6

11

400

7+8

15

500

9+8

17

Sums of 10

100

What do I add to 10 to get 10?

0

200

What do I add to 3 to get 10?

7

300

What do I add to 5 to get 10?

5

400

What do I add to 8 to get 10?

2

500

What is the answer to an addition problem?

Sum