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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 567 · 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. 1.22 × 75 =
  2. 2.14 × 35 =
  3. 3.65 × 10 =
  4. 4.6 × 65 =
  5. 5.75 × 14 =
  6. 6.45 × 34 =
  7. 7.14 × 45 =
  8. 8.18 × 15 =
  9. 9.25 × 16 =
  10. 10.15 × 32 =
  11. 11.75 × 30 =
  12. 12.75 × 10 =
  13. 13.125 × 10 =
  14. 14.35 × 30 =
  15. 15.40 × 65 =
  16. 16.25 × 38 =
  17. 17.65 × 38 =
  18. 18.35 × 10 =
  19. 19.40 × 25 =
  20. 20.38 × 35 =
  21. 21.75 × 14 =
  22. 22.25 × 38 =
  23. 23.6 × 65 =
  24. 24.35 × 26 =
  25. 25.35 × 28 =
  26. 26.55 × 20 =
  27. 27.25 × 28 =
  28. 28.55 × 36 =
  29. 29.55 × 40 =
  30. 30.35 × 14 =
  31. 31.26 × 125 =
  32. 32.30 × 35 =
  33. 33.65 × 30 =
  34. 34.12 × 75 =
  35. 35.15 × 22 =
  36. 36.75 × 26 =
  37. 37.12 × 35 =
  38. 38.15 × 16 =
  39. 39.65 × 8 =
  40. 40.35 × 38 =

Answer key

  1. 1650
  2. 490
  3. 650
  4. 390
  5. 1050
  6. 1530
  7. 630
  8. 270
  9. 400
  10. 480
  11. 2250
  12. 750
  13. 1250
  14. 1050
  15. 2600
  16. 950
  17. 2470
  18. 350
  19. 1000
  20. 1330
  21. 1050
  22. 950
  23. 390
  24. 910
  25. 980
  26. 1100
  27. 700
  28. 1980
  29. 2200
  30. 490
  31. 3250
  32. 1050
  33. 1950
  34. 900
  35. 330
  36. 1950
  37. 420
  38. 240
  39. 520
  40. 1330

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