Mr. Ryan's Doubles

Doubles to 10

100

double 1

2

200

double 2

4

300

double

3

400

double 4

8

500

double 5

10

Doubles to 20

100

double 6

12

200

double 7

14

300

double 8

16

400

double 9

18

500

double 10

20

Doubles to 10 +1

100

1+2

3

200

2+3

5

300

3+4

7

400

4+5

9

500

5+6

11

Doubles to 20 +1

100

6+7

13

200

7+8

15

300

8+9

17

400

9+10

19

500

10+11

21

Add 10

100

3+10

13

200

7+10

17

300

20+10

30

400

44+10

54

500

79+10

89