Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 241 · 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. 1.15 × 26 =
2. 2.35 × 24 =
3. 3.65 × 8 =
4. 4.26 × 75 =
5. 5.14 × 25 =
6. 6.12 × 125 =
7. 7.55 × 18 =
8. 8.65 × 34 =
9. 9.8 × 35 =
10. 10.18 × 55 =
11. 11.32 × 35 =
12. 12.14 × 15 =
13. 13.35 × 8 =
14. 14.125 × 38 =
15. 15.22 × 35 =
16. 16.30 × 25 =
17. 17.36 × 55 =
18. 18.14 × 75 =
19. 19.18 × 65 =
20. 20.30 × 65 =
21. 21.16 × 125 =
22. 22.28 × 15 =
23. 23.6 × 125 =
24. 24.28 × 75 =
25. 25.30 × 25 =
26. 26.25 × 34 =
27. 27.55 × 16 =
28. 28.30 × 125 =
29. 29.75 × 28 =
30. 30.25 × 12 =
31. 31.6 × 15 =
32. 32.26 × 45 =
33. 33.125 × 38 =
34. 34.25 × 14 =
35. 35.35 × 40 =
36. 36.40 × 65 =
37. 37.15 × 24 =
38. 38.65 × 34 =
39. 39.36 × 125 =
40. 40.55 × 14 =

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