Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 28 · 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. 1.12 × 55 =
2. 2.35 × 6 =
3. 3.25 × 26 =
4. 4.8 × 65 =
5. 5.16 × 55 =
6. 6.25 × 34 =
7. 7.25 × 34 =
8. 8.45 × 16 =
9. 9.20 × 125 =
10. 10.75 × 22 =
11. 11.26 × 55 =
12. 12.65 × 8 =
13. 13.34 × 55 =
14. 14.14 × 15 =
15. 15.25 × 16 =
16. 16.25 × 38 =
17. 17.125 × 8 =
18. 18.40 × 15 =
19. 19.26 × 15 =
20. 20.40 × 15 =
21. 21.35 × 36 =
22. 22.55 × 6 =
23. 23.20 × 25 =
24. 24.65 × 16 =
25. 25.10 × 35 =
26. 26.25 × 14 =
27. 27.15 × 8 =
28. 28.18 × 15 =
29. 29.35 × 16 =
30. 30.12 × 75 =
31. 31.38 × 35 =
32. 32.28 × 125 =
33. 33.15 × 28 =
34. 34.125 × 34 =
35. 35.36 × 55 =
36. 36.20 × 35 =
37. 37.26 × 15 =
38. 38.25 × 8 =
39. 39.34 × 65 =
40. 40.34 × 35 =

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