Show:
Multiples of 10 Subtraction
Adding within 20
Subtraction within 10
Missing Addend
Related Subtraction
100

50-20

30

100

10+7

17

100

9-8

1

100

11 +       = 15

4

100

3+8=11

11-3=8

11-8=3

200

70-30

40

200

9+9

18

200

5-3

2

200

     - 3 = 6

9

200

9+10=19

19-10=9

19-9=10

300

90-60

30

300

9+6

15


300

10-6

4

300

16 -      = 4

12

300

6+6=12

12-6=6

400

100-20

80

400

8+3

11

400

8-5

3

400

     + 7= 12

5

400

7+11=18

18-11=7

18-7=11

500

80-30

50

500

6+8

14

500

7-6

1

500

     - 3= 17

20

500

15+4=19

19-15=4

9-4=15