Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 790 · 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. 1.75 × 6 =
2. 2.22 × 55 =
3. 3.75 × 14 =
4. 4.22 × 65 =
5. 5.125 × 26 =
6. 6.25 × 14 =
7. 7.14 × 35 =
8. 8.45 × 14 =
9. 9.26 × 15 =
10. 10.75 × 28 =
11. 11.45 × 18 =
12. 12.75 × 10 =
13. 13.40 × 45 =
14. 14.10 × 45 =
15. 15.22 × 35 =
16. 16.14 × 35 =
17. 17.8 × 55 =
18. 18.125 × 14 =
19. 19.35 × 22 =
20. 20.20 × 25 =
21. 21.24 × 125 =
22. 22.65 × 16 =
23. 23.15 × 28 =
24. 24.125 × 28 =
25. 25.28 × 125 =
26. 26.36 × 55 =
27. 27.34 × 15 =
28. 28.55 × 20 =
29. 29.8 × 75 =
30. 30.35 × 8 =
31. 31.25 × 6 =
32. 32.34 × 35 =
33. 33.75 × 8 =
34. 34.65 × 40 =
35. 35.25 × 14 =
36. 36.25 × 14 =
37. 37.65 × 30 =
38. 38.16 × 15 =
39. 39.28 × 45 =
40. 40.6 × 75 =

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