Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 882 · 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. 1.8 × 15 =
2. 2.125 × 28 =
3. 3.15 × 14 =
4. 4.10 × 125 =
5. 5.65 × 26 =
6. 6.125 × 10 =
7. 7.36 × 25 =
8. 8.75 × 38 =
9. 9.28 × 65 =
10. 10.36 × 25 =
11. 11.25 × 8 =
12. 12.35 × 26 =
13. 13.75 × 14 =
14. 14.65 × 40 =
15. 15.15 × 16 =
16. 16.15 × 14 =
17. 17.40 × 15 =
18. 18.30 × 75 =
19. 19.35 × 6 =
20. 20.18 × 65 =
21. 21.18 × 25 =
22. 22.55 × 6 =
23. 23.45 × 34 =
24. 24.45 × 16 =
25. 25.65 × 38 =
26. 26.10 × 125 =
27. 27.6 × 15 =
28. 28.35 × 34 =
29. 29.6 × 75 =
30. 30.18 × 35 =
31. 31.15 × 34 =
32. 32.14 × 65 =
33. 33.30 × 15 =
34. 34.45 × 32 =
35. 35.8 × 15 =
36. 36.65 × 22 =
37. 37.12 × 45 =
38. 38.35 × 26 =
39. 39.6 × 55 =
40. 40.40 × 75 =

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