Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 987 · 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 × 75 =
2. 2.45 × 36 =
3. 3.18 × 25 =
4. 4.10 × 45 =
5. 5.125 × 28 =
6. 6.35 × 26 =
7. 7.35 × 20 =
8. 8.65 × 16 =
9. 9.24 × 15 =
10. 10.14 × 75 =
11. 11.35 × 10 =
12. 12.18 × 55 =
13. 13.65 × 22 =
14. 14.35 × 6 =
15. 15.125 × 34 =
16. 16.34 × 75 =
17. 17.32 × 15 =
18. 18.34 × 35 =
19. 19.25 × 22 =
20. 20.55 × 26 =
21. 21.125 × 30 =
22. 22.25 × 32 =
23. 23.28 × 25 =
24. 24.15 × 12 =
25. 25.8 × 15 =
26. 26.65 × 30 =
27. 27.15 × 38 =
28. 28.24 × 75 =
29. 29.28 × 125 =
30. 30.14 × 55 =
31. 31.12 × 15 =
32. 32.20 × 75 =
33. 33.22 × 35 =
34. 34.15 × 24 =
35. 35.26 × 65 =
36. 36.18 × 65 =
37. 37.36 × 15 =
38. 38.40 × 45 =
39. 39.28 × 35 =
40. 40.34 × 35 =

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