Show:
Doubles
Doubles +1
Combinations of 10
Counting up/back
Name that strategy
100

2+2

4

100

1+2

1+1+1=3

100

9+ ____ =10

1

100

1+1

2

100

3+3

Doubles

200

4+4

8

200

3+4

3+3+1=7

200

5+____=10

5

200

3+2

5

200

7+3

Combinations of ten

300

5+5

10

300

4+5

4+4+1=9

300

____+3=10

7

300

6+1

7

300

9+1

Combinations of 10 or counting on

400

7+7

14

400

5+6

5+5+1=11

400

6+___=10

4

400

4+2

6

400

4+2

Counting on

500

9+9

18

500

10+11

10+10+1

500

___ +2=10

8

500

9+2

11

500

5+6

Doubles +1