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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 688 · 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. 1.75 × 6 =
  2. 2.45 × 28 =
  3. 3.18 × 15 =
  4. 4.22 × 65 =
  5. 5.75 × 38 =
  6. 6.35 × 28 =
  7. 7.20 × 55 =
  8. 8.24 × 75 =
  9. 9.55 × 8 =
  10. 10.36 × 55 =
  11. 11.8 × 25 =
  12. 12.40 × 25 =
  13. 13.8 × 15 =
  14. 14.40 × 35 =
  15. 15.75 × 12 =
  16. 16.75 × 18 =
  17. 17.55 × 24 =
  18. 18.125 × 10 =
  19. 19.15 × 38 =
  20. 20.65 × 30 =
  21. 21.30 × 75 =
  22. 22.35 × 40 =
  23. 23.75 × 26 =
  24. 24.25 × 14 =
  25. 25.25 × 28 =
  26. 26.35 × 26 =
  27. 27.75 × 40 =
  28. 28.25 × 26 =
  29. 29.26 × 55 =
  30. 30.55 × 30 =
  31. 31.55 × 10 =
  32. 32.35 × 8 =
  33. 33.10 × 55 =
  34. 34.15 × 36 =
  35. 35.20 × 125 =
  36. 36.36 × 45 =
  37. 37.18 × 35 =
  38. 38.35 × 28 =
  39. 39.15 × 34 =
  40. 40.38 × 75 =

Answer key

  1. 450
  2. 1260
  3. 270
  4. 1430
  5. 2850
  6. 980
  7. 1100
  8. 1800
  9. 440
  10. 1980
  11. 200
  12. 1000
  13. 120
  14. 1400
  15. 900
  16. 1350
  17. 1320
  18. 1250
  19. 570
  20. 1950
  21. 2250
  22. 1400
  23. 1950
  24. 350
  25. 700
  26. 910
  27. 3000
  28. 650
  29. 1430
  30. 1650
  31. 550
  32. 280
  33. 550
  34. 540
  35. 2500
  36. 1620
  37. 630
  38. 980
  39. 510
  40. 2850

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