Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 583 · 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. 1.15 × 26 =
2. 2.65 × 30 =
3. 3.8 × 35 =
4. 4.6 × 125 =
5. 5.34 × 65 =
6. 6.35 × 6 =
7. 7.35 × 26 =
8. 8.18 × 35 =
9. 9.28 × 25 =
10. 10.25 × 30 =
11. 11.10 × 125 =
12. 12.15 × 18 =
13. 13.45 × 12 =
14. 14.125 × 28 =
15. 15.55 × 26 =
16. 16.24 × 45 =
17. 17.16 × 55 =
18. 18.55 × 26 =
19. 19.25 × 20 =
20. 20.8 × 55 =
21. 21.28 × 45 =
22. 22.35 × 20 =
23. 23.45 × 38 =
24. 24.10 × 35 =
25. 25.55 × 14 =
26. 26.12 × 65 =
27. 27.24 × 125 =
28. 28.25 × 10 =
29. 29.75 × 8 =
30. 30.6 × 45 =
31. 31.16 × 125 =
32. 32.14 × 25 =
33. 33.12 × 55 =
34. 34.40 × 55 =
35. 35.15 × 14 =
36. 36.125 × 10 =
37. 37.32 × 35 =
38. 38.25 × 32 =
39. 39.40 × 15 =
40. 40.38 × 15 =

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