Show:
Doubling tens
Doubles to 20
Near Doubles to 20
Doubles to 100
Near Doubles to 100
100

20 + 20

40
100

6 + 6

12

100

5 + 6

11

100

15 + 15

30

100

10 + 11

21

200

40+40

80
200

7 + 7

14

200
8 + 7

15

200

18 + 18

36

200

20 + 21

41

300

50+ 50

100
300

8 + 8

16

300

8 + 9

17

300

20 + 20

40

300

25 + 26

51

400

60 + 60

120

400

9 + 9

18

400

6 + 7

13

400

25 + 25

50

400

30 + 29

59

500

80 + 80

160

500

10 + 10

20

500

7 + 6

13

500

50 + 50

100

500

50 + 49

99