Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 646 · 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. 1.18 × 35 =
2. 2.45 × 16 =
3. 3.12 × 15 =
4. 4.22 × 65 =
5. 5.18 × 65 =
6. 6.55 × 18 =
7. 7.8 × 65 =
8. 8.36 × 55 =
9. 9.125 × 26 =
10. 10.45 × 8 =
11. 11.65 × 6 =
12. 12.28 × 75 =
13. 13.8 × 35 =
14. 14.16 × 15 =
15. 15.18 × 35 =
16. 16.25 × 12 =
17. 17.75 × 18 =
18. 18.24 × 45 =
19. 19.24 × 25 =
20. 20.14 × 125 =
21. 21.25 × 24 =
22. 22.35 × 28 =
23. 23.20 × 15 =
24. 24.45 × 22 =
25. 25.55 × 18 =
26. 26.28 × 65 =
27. 27.125 × 34 =
28. 28.35 × 14 =
29. 29.125 × 6 =
30. 30.75 × 20 =
31. 31.15 × 32 =
32. 32.45 × 30 =
33. 33.14 × 45 =
34. 34.6 × 55 =
35. 35.25 × 36 =
36. 36.55 × 38 =
37. 37.125 × 6 =
38. 38.32 × 125 =
39. 39.18 × 65 =
40. 40.12 × 75 =

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