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MENTAL COMPUTATION. MULTIPLICATION and DIVISION. 1. Double 12. 2. Double 50. 3. Double 33. 4. Double 66. 5. Double 45. 6. 2 x 18 =. 7. 2 x 100 =. 8. 120 x 2 =. 9. 2 x 350 =. 10. 500 x 2 =. 11. 2 x 75 =. 12. 2 x 80 =. 13. 2 x 84 =. 14. 4 x 23 =. 15. 4 x 36 =. 16.
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MENTAL COMPUTATION MULTIPLICATION and DIVISION
1 Double 12
2 Double 50
3 Double 33
4 Double 66
5 Double 45
6 2 x 18 =
7 2 x 100 =
8 120 x 2 =
9 2 x 350 =
10 500 x 2 =
11 2 x 75 =
12 2 x 80 =
13 2 x 84 =
14 4 x 23 =
15 4 x 36 =
16 5 x 70 =
17 10 x 70 =
18 10 x 78 =
19 100 x 18 =
20 Halve 24
21 Halve 16
22 Halve 48
23 Halve 500
24 Halve 160
25 86 ÷ 2 =
26 92 ÷ 2 =
27 78 ÷ 2 =
28 340 ÷ 2 =
29 400 ÷ 2 =
30 270 ÷ 10 =