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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 474 · 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. 1.36 × 45 =
  2. 2.10 × 65 =
  3. 3.15 × 8 =
  4. 4.15 × 14 =
  5. 5.45 × 28 =
  6. 6.35 × 12 =
  7. 7.65 × 38 =
  8. 8.55 × 10 =
  9. 9.65 × 18 =
  10. 10.30 × 35 =
  11. 11.12 × 15 =
  12. 12.125 × 16 =
  13. 13.55 × 10 =
  14. 14.125 × 28 =
  15. 15.125 × 14 =
  16. 16.35 × 18 =
  17. 17.45 × 22 =
  18. 18.14 × 125 =
  19. 19.35 × 36 =
  20. 20.35 × 20 =
  21. 21.55 × 14 =
  22. 22.75 × 10 =
  23. 23.45 × 12 =
  24. 24.75 × 24 =
  25. 25.6 × 75 =
  26. 26.65 × 8 =
  27. 27.34 × 25 =
  28. 28.15 × 24 =
  29. 29.38 × 15 =
  30. 30.30 × 55 =
  31. 31.45 × 18 =
  32. 32.15 × 26 =
  33. 33.20 × 65 =
  34. 34.25 × 22 =
  35. 35.32 × 25 =
  36. 36.14 × 75 =
  37. 37.65 × 40 =
  38. 38.55 × 8 =
  39. 39.125 × 14 =
  40. 40.36 × 35 =

Answer key

  1. 1620
  2. 650
  3. 120
  4. 210
  5. 1260
  6. 420
  7. 2470
  8. 550
  9. 1170
  10. 1050
  11. 180
  12. 2000
  13. 550
  14. 3500
  15. 1750
  16. 630
  17. 990
  18. 1750
  19. 1260
  20. 700
  21. 770
  22. 750
  23. 540
  24. 1800
  25. 450
  26. 520
  27. 850
  28. 360
  29. 570
  30. 1650
  31. 810
  32. 390
  33. 1300
  34. 550
  35. 800
  36. 1050
  37. 2600
  38. 440
  39. 1750
  40. 1260

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