Show:
Addition to 20
Subtraction within 20
Addition within 100
Subtraction within 100
100's
100

17+3 = 

20

100

11-6=

5

100

50+25

75

100

40-30

10

100

500+200

700

200

14 + 5 = 

19

200

16-7=

9

200

65+35

100

200

92-18

74

200

750-150

600

300

7+6=

13

300

20-12

8

300

47+23

70

300

90-85

5

300

400+220

620

400
5+13=

18

400

13-4

9

400

84+10

94

400

66-55

11

400

432+100

532

500

7+11=

18

500

19-6

13

500

28+34

62

500

74-12

62

500

990-300

690