Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 982 · 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. 1.55 × 14 =
2. 2.55 × 16 =
3. 3.12 × 15 =
4. 4.16 × 35 =
5. 5.65 × 26 =
6. 6.36 × 35 =
7. 7.28 × 15 =
8. 8.34 × 45 =
9. 9.75 × 40 =
10. 10.14 × 25 =
11. 11.55 × 8 =
12. 12.35 × 28 =
13. 13.55 × 28 =
14. 14.75 × 20 =
15. 15.75 × 22 =
16. 16.22 × 65 =
17. 17.28 × 15 =
18. 18.125 × 38 =
19. 19.45 × 10 =
20. 20.16 × 35 =
21. 21.18 × 25 =
22. 22.35 × 20 =
23. 23.65 × 26 =
24. 24.26 × 35 =
25. 25.45 × 32 =
26. 26.28 × 45 =
27. 27.35 × 10 =
28. 28.15 × 36 =
29. 29.65 × 20 =
30. 30.25 × 38 =
31. 31.55 × 24 =
32. 32.14 × 35 =
33. 33.26 × 125 =
34. 34.125 × 14 =
35. 35.16 × 55 =
36. 36.15 × 10 =
37. 37.6 × 75 =
38. 38.18 × 25 =
39. 39.20 × 125 =
40. 40.26 × 75 =

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