Counting by 10's
Add 3 #'s/Friendly 10's
Adding by 10's
Subtracting by 10's
Make a new problem
100
10
20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120
100
1 + 5 + 5 =
11
100
23 + 10 =
33
100

20 - 10 =

10
100
2 + 3 + 7
any problem adding 2, 3 and 7 in a different order.
200
25
35, 45, 55, 65, 75, 85, 95, 105, 115
200

2 + 4 + 6 =

12
200

35 + 20 =

55
200
40 - 10 = 
30
200
9 + 5 + 4

any problem adding 9, 5 and 4 in a different order.

300
33
43, 53, 63, 73, 83, 93, 103, 113
300

2 + 8 + 3 =

13
300
54 + 30 =
84
300

50 - 20 =

30
300
1 + 9 + 8

any problem adding 1, 9 and 8 in a different order.

400
68
78, 88, 98, 108, 118
400

6 + 4 + 9 =

19
400

27 + 40 =

67
400
80 - 40 =
40
400
10 + 3 + 5

any problem adding 10, 3 and 5 in a different order.

500
12
22, 32, 42, 52, 62, 72, 82, 92, 102, 112
500

3 + 6 + 7 =

16
500

89 + 10 =

99
500
90 - 70 =
20
500
29 + 87 + 99

any problem adding 29, 87 and 99 in a different order.

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