Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 869 · 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. 1.125 × 12 =
2. 2.35 × 12 =
3. 3.55 × 20 =
4. 4.15 × 8 =
5. 5.15 × 12 =
6. 6.8 × 75 =
7. 7.25 × 18 =
8. 8.35 × 6 =
9. 9.45 × 28 =
10. 10.14 × 55 =
11. 11.12 × 15 =
12. 12.8 × 75 =
13. 13.55 × 12 =
14. 14.22 × 65 =
15. 15.22 × 45 =
16. 16.38 × 75 =
17. 17.25 × 28 =
18. 18.35 × 10 =
19. 19.25 × 34 =
20. 20.30 × 125 =
21. 21.75 × 22 =
22. 22.10 × 25 =
23. 23.8 × 55 =
24. 24.15 × 18 =
25. 25.75 × 24 =
26. 26.25 × 12 =
27. 27.34 × 65 =
28. 28.36 × 75 =
29. 29.55 × 32 =
30. 30.45 × 38 =
31. 31.65 × 6 =
32. 32.25 × 14 =
33. 33.15 × 6 =
34. 34.14 × 75 =
35. 35.35 × 32 =
36. 36.35 × 28 =
37. 37.35 × 30 =
38. 38.34 × 125 =
39. 39.36 × 35 =
40. 40.25 × 30 =

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