Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 721 · 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. 1.34 × 35 =
2. 2.125 × 10 =
3. 3.28 × 125 =
4. 4.75 × 36 =
5. 5.55 × 10 =
6. 6.26 × 75 =
7. 7.25 × 28 =
8. 8.16 × 65 =
9. 9.14 × 35 =
10. 10.15 × 8 =
11. 11.12 × 35 =
12. 12.65 × 32 =
13. 13.55 × 22 =
14. 14.12 × 65 =
15. 15.32 × 45 =
16. 16.10 × 15 =
17. 17.12 × 35 =
18. 18.65 × 22 =
19. 19.26 × 45 =
20. 20.14 × 25 =
21. 21.55 × 12 =
22. 22.25 × 30 =
23. 23.25 × 12 =
24. 24.6 × 75 =
25. 25.125 × 10 =
26. 26.34 × 75 =
27. 27.15 × 40 =
28. 28.65 × 12 =
29. 29.45 × 8 =
30. 30.10 × 55 =
31. 31.10 × 75 =
32. 32.24 × 25 =
33. 33.36 × 35 =
34. 34.35 × 22 =
35. 35.15 × 20 =
36. 36.35 × 18 =
37. 37.25 × 16 =
38. 38.55 × 32 =
39. 39.65 × 30 =
40. 40.8 × 75 =

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