Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 318 · 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. 1.75 × 26 =
2. 2.65 × 16 =
3. 3.34 × 35 =
4. 4.22 × 65 =
5. 5.34 × 125 =
6. 6.36 × 55 =
7. 7.55 × 20 =
8. 8.32 × 45 =
9. 9.35 × 12 =
10. 10.14 × 45 =
11. 11.38 × 45 =
12. 12.125 × 16 =
13. 13.22 × 15 =
14. 14.10 × 65 =
15. 15.10 × 25 =
16. 16.28 × 75 =
17. 17.125 × 16 =
18. 18.55 × 16 =
19. 19.65 × 40 =
20. 20.125 × 36 =
21. 21.25 × 30 =
22. 22.36 × 15 =
23. 23.8 × 15 =
24. 24.38 × 65 =
25. 25.36 × 25 =
26. 26.34 × 125 =
27. 27.65 × 30 =
28. 28.45 × 10 =
29. 29.65 × 38 =
30. 30.30 × 75 =
31. 31.65 × 32 =
32. 32.15 × 14 =
33. 33.35 × 36 =
34. 34.12 × 25 =
35. 35.25 × 12 =
36. 36.38 × 25 =
37. 37.18 × 125 =
38. 38.25 × 14 =
39. 39.15 × 34 =
40. 40.18 × 125 =

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