Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 39 · 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. 1.30 × 35 =
2. 2.75 × 26 =
3. 3.55 × 36 =
4. 4.45 × 10 =
5. 5.125 × 8 =
6. 6.22 × 35 =
7. 7.35 × 36 =
8. 8.45 × 6 =
9. 9.10 × 45 =
10. 10.36 × 55 =
11. 11.26 × 65 =
12. 12.24 × 65 =
13. 13.35 × 38 =
14. 14.55 × 24 =
15. 15.40 × 75 =
16. 16.40 × 45 =
17. 17.75 × 12 =
18. 18.12 × 75 =
19. 19.30 × 15 =
20. 20.55 × 10 =
21. 21.25 × 14 =
22. 22.35 × 34 =
23. 23.34 × 75 =
24. 24.30 × 55 =
25. 25.28 × 45 =
26. 26.15 × 14 =
27. 27.12 × 25 =
28. 28.45 × 20 =
29. 29.55 × 20 =
30. 30.32 × 55 =
31. 31.25 × 36 =
32. 32.6 × 35 =
33. 33.55 × 36 =
34. 34.125 × 30 =
35. 35.40 × 55 =
36. 36.18 × 35 =
37. 37.16 × 25 =
38. 38.24 × 45 =
39. 39.75 × 32 =
40. 40.25 × 16 =

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