Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 451 · 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 × 40 =
2. 2.15 × 18 =
3. 3.35 × 18 =
4. 4.35 × 40 =
5. 5.6 × 125 =
6. 6.28 × 15 =
7. 7.55 × 8 =
8. 8.125 × 12 =
9. 9.34 × 35 =
10. 10.55 × 18 =
11. 11.14 × 55 =
12. 12.30 × 15 =
13. 13.65 × 10 =
14. 14.38 × 125 =
15. 15.75 × 10 =
16. 16.15 × 20 =
17. 17.8 × 15 =
18. 18.28 × 15 =
19. 19.40 × 125 =
20. 20.25 × 14 =
21. 21.20 × 25 =
22. 22.25 × 40 =
23. 23.125 × 24 =
24. 24.35 × 38 =
25. 25.36 × 15 =
26. 26.75 × 14 =
27. 27.55 × 10 =
28. 28.55 × 24 =
29. 29.36 × 55 =
30. 30.16 × 25 =
31. 31.65 × 8 =
32. 32.75 × 16 =
33. 33.10 × 45 =
34. 34.45 × 32 =
35. 35.75 × 6 =
36. 36.25 × 30 =
37. 37.35 × 8 =
38. 38.26 × 65 =
39. 39.45 × 12 =
40. 40.28 × 45 =

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