Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 735 · 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. 2.15 × 8 =
3. 3.35 × 24 =
4. 4.25 × 8 =
5. 5.25 × 12 =
6. 6.35 × 12 =
7. 7.14 × 15 =
8. 8.45 × 24 =
9. 9.40 × 25 =
10. 10.75 × 18 =
11. 11.15 × 28 =
12. 12.15 × 14 =
13. 13.125 × 6 =
14. 14.65 × 36 =
15. 15.45 × 16 =
16. 16.65 × 20 =
17. 17.125 × 20 =
18. 18.65 × 10 =
19. 19.45 × 20 =
20. 20.18 × 55 =
21. 21.55 × 8 =
22. 22.75 × 14 =
23. 23.10 × 55 =
24. 24.45 × 24 =
25. 25.125 × 6 =
26. 26.24 × 15 =
27. 27.6 × 75 =
28. 28.55 × 30 =
29. 29.30 × 25 =
30. 30.45 × 16 =
31. 31.75 × 18 =
32. 32.45 × 18 =
33. 33.34 × 125 =
34. 34.15 × 22 =
35. 35.15 × 18 =
36. 36.25 × 10 =
37. 37.34 × 35 =
38. 38.32 × 75 =
39. 39.38 × 35 =
40. 40.25 × 20 =

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