Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 705 · 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 × 18 =
2. 2.65 × 34 =
3. 3.32 × 55 =
4. 4.22 × 35 =
5. 5.55 × 40 =
6. 6.125 × 28 =
7. 7.14 × 75 =
8. 8.65 × 22 =
9. 9.34 × 65 =
10. 10.10 × 25 =
11. 11.75 × 40 =
12. 12.55 × 12 =
13. 13.45 × 10 =
14. 14.36 × 35 =
15. 15.65 × 40 =
16. 16.55 × 26 =
17. 17.34 × 35 =
18. 18.6 × 35 =
19. 19.24 × 55 =
20. 20.30 × 75 =
21. 21.65 × 18 =
22. 22.34 × 45 =
23. 23.14 × 125 =
24. 24.10 × 35 =
25. 25.15 × 32 =
26. 26.32 × 35 =
27. 27.55 × 8 =
28. 28.34 × 35 =
29. 29.35 × 10 =
30. 30.8 × 35 =
31. 31.25 × 32 =
32. 32.55 × 36 =
33. 33.28 × 65 =
34. 34.35 × 26 =
35. 35.55 × 34 =
36. 36.36 × 55 =
37. 37.125 × 40 =
38. 38.22 × 125 =
39. 39.75 × 6 =
40. 40.125 × 34 =

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