Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 658 · 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 × 24 =
2. 2.35 × 18 =
3. 3.25 × 38 =
4. 4.36 × 35 =
5. 5.25 × 18 =
6. 6.14 × 125 =
7. 7.34 × 75 =
8. 8.35 × 26 =
9. 9.34 × 45 =
10. 10.22 × 125 =
11. 11.35 × 30 =
12. 12.125 × 18 =
13. 13.35 × 40 =
14. 14.45 × 14 =
15. 15.15 × 16 =
16. 16.12 × 35 =
17. 17.24 × 45 =
18. 18.25 × 6 =
19. 19.30 × 75 =
20. 20.75 × 24 =
21. 21.16 × 125 =
22. 22.34 × 15 =
23. 23.15 × 16 =
24. 24.125 × 6 =
25. 25.15 × 38 =
26. 26.45 × 20 =
27. 27.45 × 20 =
28. 28.45 × 24 =
29. 29.26 × 75 =
30. 30.16 × 35 =
31. 31.55 × 36 =
32. 32.15 × 12 =
33. 33.25 × 22 =
34. 34.14 × 125 =
35. 35.35 × 24 =
36. 36.125 × 6 =
37. 37.40 × 25 =
38. 38.36 × 65 =
39. 39.30 × 25 =
40. 40.6 × 125 =

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