Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 396 · 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. 1.36 × 35 =
2. 2.14 × 25 =
3. 3.20 × 65 =
4. 4.25 × 16 =
5. 5.75 × 18 =
6. 6.14 × 25 =
7. 7.15 × 14 =
8. 8.38 × 125 =
9. 9.45 × 14 =
10. 10.55 × 38 =
11. 11.12 × 25 =
12. 12.8 × 25 =
13. 13.8 × 45 =
14. 14.75 × 14 =
15. 15.30 × 125 =
16. 16.16 × 65 =
17. 17.75 × 6 =
18. 18.65 × 36 =
19. 19.75 × 10 =
20. 20.15 × 6 =
21. 21.75 × 20 =
22. 22.65 × 8 =
23. 23.34 × 125 =
24. 24.75 × 10 =
25. 25.6 × 35 =
26. 26.15 × 14 =
27. 27.45 × 40 =
28. 28.125 × 26 =
29. 29.25 × 8 =
30. 30.14 × 15 =
31. 31.15 × 16 =
32. 32.24 × 15 =
33. 33.15 × 30 =
34. 34.65 × 34 =
35. 35.18 × 75 =
36. 36.24 × 15 =
37. 37.45 × 16 =
38. 38.25 × 20 =
39. 39.6 × 75 =
40. 40.45 × 24 =

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