Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 598 · 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. 1.34 × 35 =
2. 2.35 × 18 =
3. 3.32 × 55 =
4. 4.55 × 6 =
5. 5.6 × 65 =
6. 6.34 × 35 =
7. 7.15 × 34 =
8. 8.45 × 12 =
9. 9.32 × 15 =
10. 10.45 × 12 =
11. 11.32 × 125 =
12. 12.75 × 12 =
13. 13.15 × 38 =
14. 14.12 × 45 =
15. 15.25 × 10 =
16. 16.24 × 75 =
17. 17.65 × 38 =
18. 18.40 × 15 =
19. 19.12 × 35 =
20. 20.8 × 65 =
21. 21.8 × 125 =
22. 22.36 × 15 =
23. 23.45 × 14 =
24. 24.55 × 32 =
25. 25.35 × 12 =
26. 26.6 × 55 =
27. 27.18 × 15 =
28. 28.25 × 14 =
29. 29.10 × 125 =
30. 30.24 × 55 =
31. 31.35 × 24 =
32. 32.125 × 40 =
33. 33.24 × 55 =
34. 34.125 × 24 =
35. 35.12 × 125 =
36. 36.45 × 16 =
37. 37.24 × 65 =
38. 38.20 × 65 =
39. 39.35 × 22 =
40. 40.16 × 65 =

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