Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 150 · 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. 1.6 × 35 =
2. 2.6 × 45 =
3. 3.65 × 24 =
4. 4.32 × 65 =
5. 5.125 × 38 =
6. 6.35 × 36 =
7. 7.26 × 125 =
8. 8.75 × 16 =
9. 9.125 × 24 =
10. 10.40 × 75 =
11. 11.8 × 15 =
12. 12.35 × 18 =
13. 13.38 × 15 =
14. 14.25 × 26 =
15. 15.30 × 65 =
16. 16.24 × 65 =
17. 17.34 × 65 =
18. 18.55 × 18 =
19. 19.15 × 32 =
20. 20.32 × 55 =
21. 21.30 × 75 =
22. 22.38 × 55 =
23. 23.16 × 25 =
24. 24.14 × 15 =
25. 25.14 × 25 =
26. 26.34 × 25 =
27. 27.28 × 55 =
28. 28.15 × 34 =
29. 29.35 × 18 =
30. 30.45 × 16 =
31. 31.28 × 65 =
32. 32.10 × 15 =
33. 33.26 × 35 =
34. 34.8 × 15 =
35. 35.35 × 24 =
36. 36.35 × 36 =
37. 37.12 × 75 =
38. 38.12 × 25 =
39. 39.125 × 40 =
40. 40.75 × 14 =

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