Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 855 · 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. 1.14 × 55 =
2. 2.24 × 45 =
3. 3.36 × 45 =
4. 4.14 × 45 =
5. 5.12 × 15 =
6. 6.34 × 35 =
7. 7.16 × 25 =
8. 8.30 × 65 =
9. 9.35 × 12 =
10. 10.6 × 35 =
11. 11.6 × 45 =
12. 12.55 × 12 =
13. 13.30 × 55 =
14. 14.6 × 125 =
15. 15.75 × 22 =
16. 16.20 × 45 =
17. 17.45 × 6 =
18. 18.38 × 125 =
19. 19.25 × 6 =
20. 20.12 × 15 =
21. 21.16 × 45 =
22. 22.75 × 12 =
23. 23.14 × 15 =
24. 24.12 × 55 =
25. 25.6 × 35 =
26. 26.55 × 26 =
27. 27.38 × 125 =
28. 28.32 × 75 =
29. 29.35 × 16 =
30. 30.55 × 36 =
31. 31.45 × 40 =
32. 32.55 × 26 =
33. 33.75 × 12 =
34. 34.125 × 12 =
35. 35.24 × 75 =
36. 36.55 × 20 =
37. 37.55 × 20 =
38. 38.75 × 38 =
39. 39.35 × 10 =
40. 40.8 × 75 =

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