Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 588 · 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. 1.26 × 125 =
2. 2.38 × 35 =
3. 3.65 × 28 =
4. 4.55 × 40 =
5. 5.15 × 30 =
6. 6.8 × 55 =
7. 7.25 × 32 =
8. 8.34 × 75 =
9. 9.25 × 10 =
10. 10.20 × 15 =
11. 11.24 × 65 =
12. 12.40 × 35 =
13. 13.16 × 15 =
14. 14.25 × 16 =
15. 15.10 × 15 =
16. 16.40 × 55 =
17. 17.28 × 35 =
18. 18.55 × 24 =
19. 19.45 × 14 =
20. 20.36 × 75 =
21. 21.15 × 8 =
22. 22.32 × 15 =
23. 23.14 × 25 =
24. 24.125 × 10 =
25. 25.25 × 34 =
26. 26.6 × 35 =
27. 27.75 × 18 =
28. 28.35 × 28 =
29. 29.36 × 75 =
30. 30.35 × 6 =
31. 31.55 × 30 =
32. 32.15 × 26 =
33. 33.55 × 20 =
34. 34.55 × 30 =
35. 35.12 × 75 =
36. 36.45 × 24 =
37. 37.12 × 125 =
38. 38.18 × 65 =
39. 39.40 × 125 =
40. 40.6 × 45 =

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