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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 994 · 40 questions
TalentJR

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.

NameDateTime takenScore ___ / 40
  1. 1.16 × 45 =
  2. 2.65 × 10 =
  3. 3.14 × 65 =
  4. 4.12 × 65 =
  5. 5.15 × 16 =
  6. 6.28 × 75 =
  7. 7.35 × 34 =
  8. 8.32 × 125 =
  9. 9.45 × 10 =
  10. 10.35 × 38 =
  11. 11.38 × 55 =
  12. 12.45 × 22 =
  13. 13.10 × 25 =
  14. 14.18 × 35 =
  15. 15.15 × 28 =
  16. 16.125 × 24 =
  17. 17.125 × 24 =
  18. 18.25 × 28 =
  19. 19.75 × 30 =
  20. 20.35 × 32 =
  21. 21.18 × 45 =
  22. 22.15 × 38 =
  23. 23.45 × 34 =
  24. 24.15 × 12 =
  25. 25.35 × 28 =
  26. 26.35 × 6 =
  27. 27.6 × 15 =
  28. 28.16 × 35 =
  29. 29.6 × 75 =
  30. 30.8 × 55 =
  31. 31.75 × 14 =
  32. 32.75 × 30 =
  33. 33.6 × 55 =
  34. 34.75 × 38 =
  35. 35.55 × 14 =
  36. 36.65 × 20 =
  37. 37.75 × 26 =
  38. 38.15 × 8 =
  39. 39.125 × 26 =
  40. 40.15 × 32 =

Answer key

  1. 720
  2. 650
  3. 910
  4. 780
  5. 240
  6. 2100
  7. 1190
  8. 4000
  9. 450
  10. 1330
  11. 2090
  12. 990
  13. 250
  14. 630
  15. 420
  16. 3000
  17. 3000
  18. 700
  19. 2250
  20. 1120
  21. 810
  22. 570
  23. 1530
  24. 180
  25. 980
  26. 210
  27. 90
  28. 560
  29. 450
  30. 440
  31. 1050
  32. 2250
  33. 330
  34. 2850
  35. 770
  36. 1300
  37. 1950
  38. 120
  39. 3250
  40. 480

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