Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 533 · 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. 1.36 × 25 =
2. 2.45 × 28 =
3. 3.28 × 15 =
4. 4.15 × 36 =
5. 5.30 × 35 =
6. 6.55 × 28 =
7. 7.45 × 26 =
8. 8.15 × 30 =
9. 9.55 × 34 =
10. 10.125 × 32 =
11. 11.22 × 55 =
12. 12.15 × 6 =
13. 13.12 × 65 =
14. 14.35 × 24 =
15. 15.40 × 15 =
16. 16.14 × 65 =
17. 17.38 × 15 =
18. 18.16 × 45 =
19. 19.35 × 24 =
20. 20.12 × 25 =
21. 21.40 × 65 =
22. 22.25 × 14 =
23. 23.75 × 38 =
24. 24.15 × 22 =
25. 25.26 × 35 =
26. 26.20 × 15 =
27. 27.28 × 35 =
28. 28.30 × 35 =
29. 29.8 × 65 =
30. 30.6 × 15 =
31. 31.36 × 75 =
32. 32.16 × 45 =
33. 33.45 × 32 =
34. 34.34 × 65 =
35. 35.15 × 12 =
36. 36.65 × 10 =
37. 37.15 × 28 =
38. 38.34 × 15 =
39. 39.8 × 25 =
40. 40.25 × 26 =

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