Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 106 · 40 questions

How it works (Double and halve): Find the number ending in 5 and the even number. Double the one ending in 5; halve the even one. Repeat while it helps (25 → 50 → 100), then multiply.

1. 1.65 × 12 =
2. 2.65 × 34 =
3. 3.32 × 25 =
4. 4.10 × 55 =
5. 5.75 × 16 =
6. 6.14 × 35 =
7. 7.25 × 30 =
8. 8.14 × 75 =
9. 9.55 × 24 =
10. 10.65 × 40 =
11. 11.45 × 34 =
12. 12.20 × 125 =
13. 13.20 × 45 =
14. 14.35 × 16 =
15. 15.15 × 18 =
16. 16.36 × 35 =
17. 17.26 × 35 =
18. 18.15 × 38 =
19. 19.25 × 40 =
20. 20.65 × 16 =
21. 21.12 × 25 =
22. 22.125 × 18 =
23. 23.45 × 18 =
24. 24.15 × 18 =
25. 25.30 × 125 =
26. 26.15 × 36 =
27. 27.25 × 28 =
28. 28.30 × 25 =
29. 29.45 × 36 =
30. 30.34 × 35 =
31. 31.45 × 34 =
32. 32.65 × 26 =
33. 33.55 × 38 =
34. 34.45 × 28 =
35. 35.18 × 35 =
36. 36.55 × 38 =
37. 37.30 × 75 =
38. 38.125 × 40 =
39. 39.30 × 125 =
40. 40.75 × 30 =

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