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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 956 · 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. 1.65 × 22 =
  2. 2.22 × 35 =
  3. 3.34 × 25 =
  4. 4.25 × 6 =
  5. 5.26 × 75 =
  6. 6.6 × 15 =
  7. 7.30 × 15 =
  8. 8.125 × 32 =
  9. 9.38 × 55 =
  10. 10.36 × 75 =
  11. 11.40 × 25 =
  12. 12.45 × 28 =
  13. 13.15 × 26 =
  14. 14.125 × 32 =
  15. 15.75 × 10 =
  16. 16.40 × 25 =
  17. 17.32 × 125 =
  18. 18.55 × 18 =
  19. 19.34 × 15 =
  20. 20.75 × 26 =
  21. 21.34 × 15 =
  22. 22.38 × 75 =
  23. 23.10 × 125 =
  24. 24.32 × 75 =
  25. 25.55 × 6 =
  26. 26.20 × 45 =
  27. 27.26 × 65 =
  28. 28.38 × 125 =
  29. 29.6 × 75 =
  30. 30.15 × 12 =
  31. 31.45 × 12 =
  32. 32.12 × 55 =
  33. 33.65 × 8 =
  34. 34.32 × 125 =
  35. 35.35 × 30 =
  36. 36.15 × 20 =
  37. 37.75 × 40 =
  38. 38.36 × 65 =
  39. 39.24 × 25 =
  40. 40.65 × 12 =

Answer key

  1. 1430
  2. 770
  3. 850
  4. 150
  5. 1950
  6. 90
  7. 450
  8. 4000
  9. 2090
  10. 2700
  11. 1000
  12. 1260
  13. 390
  14. 4000
  15. 750
  16. 1000
  17. 4000
  18. 990
  19. 510
  20. 1950
  21. 510
  22. 2850
  23. 1250
  24. 2400
  25. 330
  26. 900
  27. 1690
  28. 4750
  29. 450
  30. 180
  31. 540
  32. 660
  33. 520
  34. 4000
  35. 1050
  36. 300
  37. 3000
  38. 2340
  39. 600
  40. 780

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