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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 661 · 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. 1.45 × 34 =
  2. 2.55 × 24 =
  3. 3.20 × 25 =
  4. 4.8 × 125 =
  5. 5.25 × 32 =
  6. 6.55 × 30 =
  7. 7.34 × 15 =
  8. 8.65 × 22 =
  9. 9.24 × 75 =
  10. 10.45 × 10 =
  11. 11.15 × 8 =
  12. 12.26 × 75 =
  13. 13.45 × 40 =
  14. 14.28 × 75 =
  15. 15.125 × 10 =
  16. 16.12 × 45 =
  17. 17.75 × 8 =
  18. 18.16 × 15 =
  19. 19.65 × 22 =
  20. 20.26 × 15 =
  21. 21.25 × 26 =
  22. 22.45 × 26 =
  23. 23.25 × 16 =
  24. 24.25 × 24 =
  25. 25.15 × 10 =
  26. 26.16 × 125 =
  27. 27.35 × 20 =
  28. 28.38 × 55 =
  29. 29.55 × 40 =
  30. 30.38 × 55 =
  31. 31.28 × 25 =
  32. 32.75 × 30 =
  33. 33.15 × 18 =
  34. 34.34 × 35 =
  35. 35.35 × 22 =
  36. 36.55 × 22 =
  37. 37.25 × 40 =
  38. 38.45 × 8 =
  39. 39.8 × 65 =
  40. 40.65 × 24 =

Answer key

  1. 1530
  2. 1320
  3. 500
  4. 1000
  5. 800
  6. 1650
  7. 510
  8. 1430
  9. 1800
  10. 450
  11. 120
  12. 1950
  13. 1800
  14. 2100
  15. 1250
  16. 540
  17. 600
  18. 240
  19. 1430
  20. 390
  21. 650
  22. 1170
  23. 400
  24. 600
  25. 150
  26. 2000
  27. 700
  28. 2090
  29. 2200
  30. 2090
  31. 700
  32. 2250
  33. 270
  34. 1190
  35. 770
  36. 1210
  37. 1000
  38. 360
  39. 520
  40. 1560

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