Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 288 · 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 × 16 =
2. 2.15 × 12 =
3. 3.35 × 34 =
4. 4.36 × 125 =
5. 5.18 × 65 =
6. 6.55 × 10 =
7. 7.20 × 65 =
8. 8.14 × 25 =
9. 9.35 × 10 =
10. 10.125 × 6 =
11. 11.25 × 32 =
12. 12.34 × 55 =
13. 13.26 × 25 =
14. 14.24 × 75 =
15. 15.38 × 75 =
16. 16.35 × 8 =
17. 17.55 × 40 =
18. 18.38 × 75 =
19. 19.35 × 18 =
20. 20.55 × 16 =
21. 21.16 × 25 =
22. 22.75 × 20 =
23. 23.36 × 65 =
24. 24.14 × 45 =
25. 25.36 × 125 =
26. 26.40 × 45 =
27. 27.25 × 18 =
28. 28.28 × 125 =
29. 29.65 × 40 =
30. 30.25 × 40 =
31. 31.8 × 65 =
32. 32.28 × 65 =
33. 33.10 × 45 =
34. 34.65 × 20 =
35. 35.55 × 20 =
36. 36.25 × 30 =
37. 37.45 × 34 =
38. 38.75 × 16 =
39. 39.32 × 35 =
40. 40.75 × 8 =

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