Show:
Subtract
Add
Make a number bond
10+
Addend Within 3
100

15 - 5 

10

100

30 + 10

40

100

4 + 9 

3 and 1 

100

9 + 3

10 + 2

100

100 + 100 + 10

210

200

10 - 6

4

200

25+ 5

30

200

6 + 8

2 and 4

200

5 + 8

10 + 3

200

100 + 50 + 5 

155

300

15 - 4

11

300

30 + 5

35

300

7 + 4

3 and 1

300

9 + 6

10 + 5

300

250 + 20 + 1

271

400

26 - 6

20

400

20 + 20

40

400

8 + 3

2 and 1

400

8 + 9

10 + 7

400

280 + 10 + 10 

300

500

28 - 7

21

500

150 + 5

155

500

8 + 6

2 and 4

500

4 + 7

10 + 1

500

286 + 100 + 2

388