Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 234 · 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. 1.125 × 34 =
2. 2.65 × 12 =
3. 3.22 × 125 =
4. 4.8 × 35 =
5. 5.75 × 22 =
6. 6.10 × 35 =
7. 7.35 × 16 =
8. 8.20 × 75 =
9. 9.28 × 125 =
10. 10.34 × 65 =
11. 11.25 × 6 =
12. 12.32 × 125 =
13. 13.32 × 125 =
14. 14.65 × 12 =
15. 15.45 × 26 =
16. 16.25 × 18 =
17. 17.40 × 25 =
18. 18.34 × 25 =
19. 19.24 × 15 =
20. 20.22 × 45 =
21. 21.55 × 6 =
22. 22.25 × 26 =
23. 23.24 × 125 =
24. 24.25 × 6 =
25. 25.32 × 75 =
26. 26.14 × 15 =
27. 27.8 × 25 =
28. 28.45 × 24 =
29. 29.28 × 25 =
30. 30.15 × 22 =
31. 31.25 × 14 =
32. 32.25 × 14 =
33. 33.35 × 36 =
34. 34.35 × 32 =
35. 35.25 × 26 =
36. 36.75 × 24 =
37. 37.38 × 75 =
38. 38.14 × 25 =
39. 39.65 × 30 =
40. 40.22 × 75 =

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