Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 679 · 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. 1.75 × 14 =
2. 2.40 × 35 =
3. 3.15 × 36 =
4. 4.14 × 35 =
5. 5.65 × 32 =
6. 6.125 × 18 =
7. 7.16 × 45 =
8. 8.36 × 15 =
9. 9.15 × 22 =
10. 10.65 × 38 =
11. 11.125 × 20 =
12. 12.14 × 125 =
13. 13.34 × 125 =
14. 14.15 × 36 =
15. 15.10 × 125 =
16. 16.125 × 12 =
17. 17.75 × 16 =
18. 18.55 × 26 =
19. 19.65 × 20 =
20. 20.40 × 25 =
21. 21.14 × 65 =
22. 22.14 × 15 =
23. 23.45 × 40 =
24. 24.25 × 6 =
25. 25.22 × 35 =
26. 26.55 × 28 =
27. 27.65 × 16 =
28. 28.75 × 32 =
29. 29.12 × 125 =
30. 30.30 × 15 =
31. 31.35 × 22 =
32. 32.32 × 75 =
33. 33.15 × 20 =
34. 34.6 × 45 =
35. 35.6 × 65 =
36. 36.14 × 125 =
37. 37.55 × 14 =
38. 38.16 × 125 =
39. 39.65 × 22 =
40. 40.8 × 15 =

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