Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 448 · 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. 2.125 × 24 =
3. 3.55 × 40 =
4. 4.20 × 35 =
5. 5.35 × 32 =
6. 6.55 × 12 =
7. 7.22 × 55 =
8. 8.125 × 12 =
9. 9.125 × 36 =
10. 10.15 × 38 =
11. 11.26 × 75 =
12. 12.45 × 10 =
13. 13.26 × 45 =
14. 14.15 × 14 =
15. 15.6 × 55 =
16. 16.28 × 75 =
17. 17.55 × 28 =
18. 18.55 × 10 =
19. 19.26 × 125 =
20. 20.45 × 6 =
21. 21.35 × 24 =
22. 22.15 × 32 =
23. 23.15 × 32 =
24. 24.45 × 24 =
25. 25.18 × 25 =
26. 26.10 × 45 =
27. 27.24 × 65 =
28. 28.35 × 36 =
29. 29.24 × 25 =
30. 30.34 × 15 =
31. 31.125 × 10 =
32. 32.20 × 25 =
33. 33.75 × 26 =
34. 34.35 × 28 =
35. 35.34 × 35 =
36. 36.65 × 26 =
37. 37.24 × 45 =
38. 38.12 × 75 =
39. 39.18 × 45 =
40. 40.14 × 55 =

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