Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 844 · 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. 1.45 × 30 =
2. 2.15 × 8 =
3. 3.8 × 125 =
4. 4.35 × 36 =
5. 5.125 × 40 =
6. 6.34 × 25 =
7. 7.12 × 15 =
8. 8.25 × 36 =
9. 9.15 × 14 =
10. 10.32 × 45 =
11. 11.75 × 10 =
12. 12.15 × 30 =
13. 13.16 × 55 =
14. 14.6 × 55 =
15. 15.65 × 20 =
16. 16.40 × 35 =
17. 17.34 × 35 =
18. 18.20 × 65 =
19. 19.55 × 26 =
20. 20.34 × 35 =
21. 21.15 × 26 =
22. 22.65 × 40 =
23. 23.25 × 8 =
24. 24.75 × 34 =
25. 25.35 × 16 =
26. 26.35 × 12 =
27. 27.75 × 6 =
28. 28.28 × 75 =
29. 29.8 × 65 =
30. 30.18 × 55 =
31. 31.75 × 8 =
32. 32.36 × 35 =
33. 33.14 × 65 =
34. 34.65 × 34 =
35. 35.45 × 38 =
36. 36.26 × 15 =
37. 37.25 × 38 =
38. 38.12 × 65 =
39. 39.55 × 40 =
40. 40.35 × 16 =

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