Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 677 · 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. 2.25 × 38 =
3. 3.65 × 10 =
4. 4.26 × 125 =
5. 5.22 × 55 =
6. 6.16 × 15 =
7. 7.10 × 65 =
8. 8.25 × 10 =
9. 9.55 × 40 =
10. 10.45 × 22 =
11. 11.12 × 55 =
12. 12.40 × 55 =
13. 13.35 × 18 =
14. 14.25 × 36 =
15. 15.36 × 35 =
16. 16.55 × 24 =
17. 17.25 × 26 =
18. 18.34 × 25 =
19. 19.35 × 38 =
20. 20.15 × 34 =
21. 21.38 × 55 =
22. 22.15 × 32 =
23. 23.12 × 55 =
24. 24.25 × 12 =
25. 25.75 × 6 =
26. 26.45 × 20 =
27. 27.55 × 6 =
28. 28.25 × 12 =
29. 29.34 × 75 =
30. 30.35 × 22 =
31. 31.15 × 10 =
32. 32.25 × 28 =
33. 33.125 × 28 =
34. 34.18 × 75 =
35. 35.10 × 125 =
36. 36.35 × 14 =
37. 37.15 × 8 =
38. 38.22 × 65 =
39. 39.28 × 45 =
40. 40.25 × 34 =

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