Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 887 · 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. 1.16 × 15 =
2. 2.55 × 26 =
3. 3.24 × 15 =
4. 4.75 × 14 =
5. 5.35 × 22 =
6. 6.45 × 20 =
7. 7.10 × 75 =
8. 8.16 × 75 =
9. 9.55 × 6 =
10. 10.34 × 65 =
11. 11.28 × 35 =
12. 12.45 × 36 =
13. 13.25 × 20 =
14. 14.75 × 10 =
15. 15.55 × 36 =
16. 16.125 × 30 =
17. 17.35 × 18 =
18. 18.75 × 14 =
19. 19.55 × 22 =
20. 20.38 × 25 =
21. 21.10 × 125 =
22. 22.55 × 10 =
23. 23.65 × 30 =
24. 24.8 × 15 =
25. 25.16 × 25 =
26. 26.25 × 8 =
27. 27.35 × 6 =
28. 28.38 × 25 =
29. 29.10 × 125 =
30. 30.15 × 10 =
31. 31.10 × 65 =
32. 32.38 × 25 =
33. 33.55 × 18 =
34. 34.25 × 30 =
35. 35.14 × 15 =
36. 36.14 × 45 =
37. 37.6 × 125 =
38. 38.125 × 36 =
39. 39.65 × 10 =
40. 40.65 × 36 =

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