Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 5 · 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. 1.24 × 65 =
2. 2.55 × 10 =
3. 3.14 × 15 =
4. 4.20 × 65 =
5. 5.25 × 12 =
6. 6.75 × 12 =
7. 7.16 × 35 =
8. 8.24 × 35 =
9. 9.14 × 25 =
10. 10.34 × 35 =
11. 11.20 × 125 =
12. 12.35 × 8 =
13. 13.10 × 45 =
14. 14.24 × 35 =
15. 15.125 × 30 =
16. 16.24 × 35 =
17. 17.16 × 15 =
18. 18.65 × 22 =
19. 19.28 × 75 =
20. 20.15 × 14 =
21. 21.125 × 28 =
22. 22.75 × 28 =
23. 23.12 × 125 =
24. 24.16 × 35 =
25. 25.55 × 20 =
26. 26.18 × 15 =
27. 27.65 × 30 =
28. 28.25 × 36 =
29. 29.125 × 34 =
30. 30.28 × 65 =
31. 31.38 × 45 =
32. 32.26 × 55 =
33. 33.20 × 15 =
34. 34.125 × 18 =
35. 35.40 × 35 =
36. 36.15 × 22 =
37. 37.12 × 45 =
38. 38.15 × 28 =
39. 39.14 × 25 =
40. 40.36 × 45 =

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