Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 342 · 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 × 8 =
2. 2.45 × 32 =
3. 3.8 × 15 =
4. 4.75 × 16 =
5. 5.65 × 16 =
6. 6.40 × 55 =
7. 7.55 × 20 =
8. 8.16 × 55 =
9. 9.65 × 22 =
10. 10.38 × 125 =
11. 11.14 × 35 =
12. 12.18 × 75 =
13. 13.36 × 125 =
14. 14.12 × 45 =
15. 15.30 × 15 =
16. 16.34 × 75 =
17. 17.22 × 35 =
18. 18.15 × 32 =
19. 19.25 × 34 =
20. 20.65 × 10 =
21. 21.16 × 65 =
22. 22.18 × 35 =
23. 23.22 × 25 =
24. 24.28 × 15 =
25. 25.45 × 26 =
26. 26.24 × 15 =
27. 27.26 × 15 =
28. 28.75 × 34 =
29. 29.125 × 34 =
30. 30.15 × 40 =
31. 31.45 × 6 =
32. 32.26 × 45 =
33. 33.24 × 15 =
34. 34.20 × 35 =
35. 35.35 × 20 =
36. 36.25 × 14 =
37. 37.18 × 125 =
38. 38.35 × 18 =
39. 39.14 × 125 =
40. 40.65 × 18 =

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