Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 391 · 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. 1.125 × 16 =
2. 2.18 × 15 =
3. 3.12 × 65 =
4. 4.45 × 30 =
5. 5.35 × 16 =
6. 6.65 × 12 =
7. 7.26 × 45 =
8. 8.28 × 65 =
9. 9.12 × 45 =
10. 10.75 × 36 =
11. 11.65 × 12 =
12. 12.34 × 75 =
13. 13.24 × 75 =
14. 14.125 × 24 =
15. 15.14 × 55 =
16. 16.34 × 25 =
17. 17.20 × 35 =
18. 18.25 × 16 =
19. 19.55 × 26 =
20. 20.32 × 25 =
21. 21.35 × 26 =
22. 22.34 × 35 =
23. 23.34 × 65 =
24. 24.14 × 75 =
25. 25.14 × 35 =
26. 26.36 × 45 =
27. 27.55 × 16 =
28. 28.35 × 12 =
29. 29.14 × 25 =
30. 30.24 × 55 =
31. 31.65 × 14 =
32. 32.15 × 8 =
33. 33.12 × 65 =
34. 34.25 × 6 =
35. 35.18 × 65 =
36. 36.25 × 6 =
37. 37.32 × 55 =
38. 38.65 × 30 =
39. 39.18 × 35 =
40. 40.6 × 65 =

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