Add/Sub to 20
Add Tens
Sub Tens
Use a H Chart
Review Add/Sub
100

12-3=

9

100

10+30=

40

100

60-40=

20

100

46+2

48

100

Kabir plants 17 seeds.  Rowan plants 8 seeds.  How many seeds do they plant?

25

200

8+9=

17

200

10+80=

90

200

70-40=

30

200

52+30

82

200

Kiluan buys 24 tomato plants. He buys 15 pepper plants.  Ho many plants does he buy?

59

300

13-7=

6

300

40+30

70

300

50-20=

30

300

63+3

66

300

71+8=

79

400

7+8=

15

400

20+60=

80
400

80-70=

10

400

68+30=

98

400

55+12=

67

500

18-7=

11

500

50+40=

90

500

90-50=

40

500

74+20=

94

500

What are the missing numbers?

22+ ___= ____

The second number has 5 more ones than the first number.

49