Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 294 · 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. 1.40 × 65 =
2. 2.35 × 24 =
3. 3.45 × 6 =
4. 4.30 × 55 =
5. 5.75 × 24 =
6. 6.18 × 75 =
7. 7.45 × 14 =
8. 8.15 × 34 =
9. 9.125 × 38 =
10. 10.36 × 25 =
11. 11.36 × 65 =
12. 12.25 × 6 =
13. 13.40 × 15 =
14. 14.75 × 32 =
15. 15.55 × 18 =
16. 16.35 × 14 =
17. 17.75 × 20 =
18. 18.15 × 26 =
19. 19.18 × 65 =
20. 20.40 × 25 =
21. 21.35 × 38 =
22. 22.75 × 24 =
23. 23.20 × 25 =
24. 24.65 × 24 =
25. 25.15 × 14 =
26. 26.34 × 125 =
27. 27.25 × 6 =
28. 28.32 × 25 =
29. 29.6 × 35 =
30. 30.14 × 65 =
31. 31.75 × 24 =
32. 32.28 × 35 =
33. 33.75 × 6 =
34. 34.28 × 45 =
35. 35.34 × 45 =
36. 36.55 × 28 =
37. 37.35 × 34 =
38. 38.34 × 65 =
39. 39.125 × 18 =
40. 40.65 × 34 =

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