Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 841 · 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. 1.35 × 12 =
2. 2.65 × 22 =
3. 3.12 × 65 =
4. 4.75 × 30 =
5. 5.18 × 35 =
6. 6.14 × 45 =
7. 7.32 × 65 =
8. 8.34 × 75 =
9. 9.55 × 16 =
10. 10.15 × 8 =
11. 11.32 × 35 =
12. 12.34 × 45 =
13. 13.40 × 65 =
14. 14.10 × 125 =
15. 15.75 × 34 =
16. 16.45 × 22 =
17. 17.14 × 55 =
18. 18.14 × 25 =
19. 19.45 × 20 =
20. 20.26 × 45 =
21. 21.125 × 10 =
22. 22.40 × 25 =
23. 23.45 × 10 =
24. 24.40 × 125 =
25. 25.34 × 25 =
26. 26.12 × 25 =
27. 27.125 × 18 =
28. 28.15 × 8 =
29. 29.65 × 30 =
30. 30.38 × 25 =
31. 31.6 × 15 =
32. 32.28 × 125 =
33. 33.14 × 125 =
34. 34.25 × 32 =
35. 35.26 × 55 =
36. 36.12 × 55 =
37. 37.125 × 6 =
38. 38.24 × 55 =
39. 39.35 × 18 =
40. 40.15 × 22 =

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