Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 999 · 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. 1.35 × 18 =
2. 2.75 × 38 =
3. 3.34 × 45 =
4. 4.28 × 65 =
5. 5.18 × 55 =
6. 6.28 × 65 =
7. 7.25 × 32 =
8. 8.15 × 14 =
9. 9.8 × 75 =
10. 10.15 × 30 =
11. 11.125 × 18 =
12. 12.20 × 75 =
13. 13.35 × 24 =
14. 14.38 × 45 =
15. 15.125 × 26 =
16. 16.25 × 14 =
17. 17.25 × 16 =
18. 18.65 × 30 =
19. 19.35 × 30 =
20. 20.15 × 16 =
21. 21.35 × 38 =
22. 22.10 × 125 =
23. 23.30 × 35 =
24. 24.15 × 32 =
25. 25.55 × 6 =
26. 26.15 × 12 =
27. 27.18 × 15 =
28. 28.28 × 15 =
29. 29.75 × 8 =
30. 30.45 × 38 =
31. 31.10 × 35 =
32. 32.28 × 65 =
33. 33.45 × 12 =
34. 34.28 × 25 =
35. 35.65 × 10 =
36. 36.14 × 45 =
37. 37.45 × 28 =
38. 38.125 × 8 =
39. 39.45 × 40 =
40. 40.25 × 18 =

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