Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 607 · 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. 1.35 × 26 =
2. 2.55 × 34 =
3. 3.75 × 34 =
4. 4.32 × 65 =
5. 5.75 × 20 =
6. 6.15 × 28 =
7. 7.34 × 75 =
8. 8.10 × 45 =
9. 9.38 × 25 =
10. 10.16 × 15 =
11. 11.40 × 15 =
12. 12.15 × 10 =
13. 13.10 × 55 =
14. 14.125 × 12 =
15. 15.8 × 125 =
16. 16.45 × 14 =
17. 17.25 × 38 =
18. 18.14 × 55 =
19. 19.26 × 125 =
20. 20.36 × 45 =
21. 21.125 × 38 =
22. 22.65 × 28 =
23. 23.65 × 32 =
24. 24.65 × 12 =
25. 25.6 × 55 =
26. 26.12 × 55 =
27. 27.30 × 45 =
28. 28.125 × 10 =
29. 29.20 × 25 =
30. 30.35 × 32 =
31. 31.18 × 15 =
32. 32.30 × 25 =
33. 33.30 × 125 =
34. 34.15 × 8 =
35. 35.38 × 35 =
36. 36.15 × 32 =
37. 37.36 × 125 =
38. 38.14 × 35 =
39. 39.75 × 26 =
40. 40.15 × 38 =

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