Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 109 · 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. 1.35 × 12 =
2. 2.55 × 14 =
3. 3.75 × 16 =
4. 4.34 × 25 =
5. 5.30 × 15 =
6. 6.14 × 55 =
7. 7.22 × 15 =
8. 8.15 × 16 =
9. 9.14 × 25 =
10. 10.12 × 125 =
11. 11.18 × 125 =
12. 12.26 × 45 =
13. 13.25 × 6 =
14. 14.15 × 14 =
15. 15.26 × 45 =
16. 16.30 × 75 =
17. 17.18 × 25 =
18. 18.20 × 75 =
19. 19.125 × 26 =
20. 20.75 × 6 =
21. 21.75 × 12 =
22. 22.55 × 34 =
23. 23.36 × 25 =
24. 24.20 × 125 =
25. 25.8 × 25 =
26. 26.35 × 24 =
27. 27.30 × 75 =
28. 28.55 × 22 =
29. 29.12 × 75 =
30. 30.12 × 55 =
31. 31.45 × 12 =
32. 32.55 × 8 =
33. 33.28 × 65 =
34. 34.26 × 35 =
35. 35.34 × 35 =
36. 36.10 × 25 =
37. 37.26 × 75 =
38. 38.36 × 125 =
39. 39.38 × 25 =
40. 40.10 × 35 =

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