Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 74 · 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. 1.18 × 65 =
2. 2.36 × 15 =
3. 3.38 × 125 =
4. 4.65 × 6 =
5. 5.10 × 125 =
6. 6.8 × 55 =
7. 7.38 × 35 =
8. 8.35 × 14 =
9. 9.45 × 26 =
10. 10.28 × 65 =
11. 11.75 × 18 =
12. 12.125 × 6 =
13. 13.20 × 15 =
14. 14.65 × 16 =
15. 15.125 × 34 =
16. 16.55 × 10 =
17. 17.45 × 16 =
18. 18.34 × 15 =
19. 19.35 × 6 =
20. 20.16 × 35 =
21. 21.32 × 25 =
22. 22.22 × 25 =
23. 23.24 × 55 =
24. 24.8 × 65 =
25. 25.55 × 34 =
26. 26.12 × 125 =
27. 27.14 × 25 =
28. 28.125 × 12 =
29. 29.12 × 25 =
30. 30.15 × 22 =
31. 31.8 × 25 =
32. 32.36 × 35 =
33. 33.24 × 25 =
34. 34.75 × 36 =
35. 35.125 × 10 =
36. 36.15 × 14 =
37. 37.28 × 75 =
38. 38.40 × 125 =
39. 39.75 × 10 =
40. 40.65 × 12 =

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