Show:
Addition to 12
Addition to 20
Base 10
Subtraction
100
What is 6 + 2?
8
100
What is 13 + 5
18
100

23

 ___tens ___ones

2 tens 3 ones

100

10-3

7

200
What is 7 + 3
10
200
What is 4 + 16
20
200

35

___ tens ___ ones

3 tens 5 ones

200

10-5

5

300
What is 6 + 6
12
300
What is 9 + 9?
18
300

46

___ tens ___ ones

4 tens 6 ones

300

15-3

12

400
What is 5 + 4
9
400
What is 7 + 8?
15
400

52

___ tens ___ ones

5 tens 2 ones

400

17-6

11

500
What is 8 + 3
11
500
What is 6 + 13?
19
500

74

___ tens ___ ones

7 tens 4 ones

500

20-11

9