Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 399 · 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 × 15 =
2. 2.12 × 55 =
3. 3.125 × 6 =
4. 4.35 × 26 =
5. 5.45 × 40 =
6. 6.22 × 125 =
7. 7.35 × 6 =
8. 8.28 × 45 =
9. 9.65 × 10 =
10. 10.65 × 34 =
11. 11.35 × 22 =
12. 12.6 × 45 =
13. 13.38 × 15 =
14. 14.20 × 25 =
15. 15.6 × 25 =
16. 16.40 × 15 =
17. 17.24 × 75 =
18. 18.45 × 24 =
19. 19.10 × 45 =
20. 20.55 × 38 =
21. 21.15 × 22 =
22. 22.45 × 12 =
23. 23.14 × 15 =
24. 24.28 × 15 =
25. 25.6 × 45 =
26. 26.14 × 25 =
27. 27.25 × 38 =
28. 28.45 × 10 =
29. 29.35 × 14 =
30. 30.26 × 45 =
31. 31.25 × 30 =
32. 32.12 × 75 =
33. 33.35 × 14 =
34. 34.12 × 65 =
35. 35.125 × 26 =
36. 36.15 × 28 =
37. 37.12 × 35 =
38. 38.30 × 75 =
39. 39.32 × 65 =
40. 40.40 × 35 =

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