Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 212 · 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. 1.22 × 35 =
2. 2.25 × 18 =
3. 3.35 × 34 =
4. 4.15 × 14 =
5. 5.15 × 28 =
6. 6.15 × 20 =
7. 7.125 × 36 =
8. 8.35 × 24 =
9. 9.34 × 25 =
10. 10.65 × 18 =
11. 11.34 × 75 =
12. 12.45 × 12 =
13. 13.10 × 25 =
14. 14.75 × 12 =
15. 15.25 × 34 =
16. 16.26 × 45 =
17. 17.14 × 75 =
18. 18.75 × 36 =
19. 19.18 × 65 =
20. 20.65 × 14 =
21. 21.15 × 10 =
22. 22.75 × 16 =
23. 23.10 × 75 =
24. 24.34 × 65 =
25. 25.34 × 25 =
26. 26.36 × 55 =
27. 27.15 × 12 =
28. 28.45 × 36 =
29. 29.40 × 55 =
30. 30.25 × 10 =
31. 31.15 × 14 =
32. 32.15 × 34 =
33. 33.65 × 28 =
34. 34.28 × 75 =
35. 35.30 × 125 =
36. 36.6 × 25 =
37. 37.24 × 55 =
38. 38.35 × 24 =
39. 39.20 × 35 =
40. 40.65 × 34 =

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