Show:
Doubles to 10
Doubles to 20
Near Doubles to 20
Doubles to 100
Near Doubles to 100
100

1 + 1

2
100

6 + 6

12

100

5 + 6

11

100

15 + 15

30

100

18 + 17

35

200

2 + 2

4

200

7 + 7

14

200
8 + 7

15

200

18 + 18

36

200

19 + 18

37

300

3 + 3

6

300

8 + 8

16

300

8 + 9

17

300

20 + 20

40

300

24 + 27

51

400

4 + 4

8

400

9 + 9

18

400

6 + 8

14

400

25 + 25

50

400

31 + 29

60

500

5 + 5

10

500

10 + 10

20

500

7 + 6

13

500

50 + 50

100

500

50 + 49

99