adding
subterating
cont by 5,s
cont by,10,s
cont by 2,s
100
5 + 5 =
What is 10
100
9 - 9 =
What is 0
100
5 10
What is 15
100
10 20
What is 30
100
2 4
What is 6
200
2 + 2 =
What is 4
200
10 - 1 =
What is 9
200
10 15
What is 20
200
4 6
What is 8
300
10 + 10 =
What is 20
300
10 - 10 =
What is 0
300
15 20
What is 25
300
50 60
What is 70
300
10 12
What is 14
400
10 + 9 =
What is 19
400
9 - 4 =
What is 5
400
5 10 15 20 25 30
What is 35
400
10 20 30 40 50
What is 60
400
10 12 14 16
What is 18
500
10 + 6 =
What is 16
500
100 - 100 =
What is 9
500
5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100
What is 105
500
10 20 30 40 50 60 70 80 90
What is 100
500
10 12 14
What is 16
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