Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 78 · 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. 2.45 × 16 =
3. 3.15 × 30 =
4. 4.15 × 8 =
5. 5.125 × 18 =
6. 6.125 × 18 =
7. 7.45 × 28 =
8. 8.75 × 12 =
9. 9.45 × 38 =
10. 10.14 × 35 =
11. 11.55 × 24 =
12. 12.8 × 35 =
13. 13.40 × 65 =
14. 14.75 × 40 =
15. 15.20 × 75 =
16. 16.35 × 26 =
17. 17.75 × 6 =
18. 18.125 × 40 =
19. 19.36 × 55 =
20. 20.55 × 18 =
21. 21.14 × 15 =
22. 22.36 × 45 =
23. 23.16 × 125 =
24. 24.75 × 10 =
25. 25.55 × 28 =
26. 26.65 × 28 =
27. 27.22 × 45 =
28. 28.18 × 65 =
29. 29.10 × 55 =
30. 30.75 × 34 =
31. 31.30 × 15 =
32. 32.65 × 18 =
33. 33.34 × 75 =
34. 34.38 × 45 =
35. 35.55 × 10 =
36. 36.15 × 38 =
37. 37.125 × 36 =
38. 38.25 × 22 =
39. 39.35 × 12 =
40. 40.25 × 30 =

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