Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 758 · 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. 1.65 × 24 =
2. 2.30 × 55 =
3. 3.38 × 35 =
4. 4.15 × 14 =
5. 5.30 × 55 =
6. 6.75 × 20 =
7. 7.125 × 26 =
8. 8.30 × 45 =
9. 9.36 × 35 =
10. 10.16 × 25 =
11. 11.14 × 25 =
12. 12.35 × 30 =
13. 13.15 × 38 =
14. 14.20 × 125 =
15. 15.40 × 15 =
16. 16.15 × 32 =
17. 17.16 × 55 =
18. 18.14 × 65 =
19. 19.26 × 75 =
20. 20.35 × 10 =
21. 21.35 × 30 =
22. 22.26 × 55 =
23. 23.55 × 18 =
24. 24.26 × 55 =
25. 25.38 × 75 =
26. 26.34 × 125 =
27. 27.65 × 20 =
28. 28.55 × 12 =
29. 29.75 × 18 =
30. 30.14 × 25 =
31. 31.55 × 24 =
32. 32.125 × 38 =
33. 33.8 × 45 =
34. 34.55 × 10 =
35. 35.75 × 32 =
36. 36.45 × 36 =
37. 37.45 × 6 =
38. 38.125 × 12 =
39. 39.35 × 34 =
40. 40.16 × 25 =

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