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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 304 · 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. 1.38 × 55 =
  2. 2.65 × 8 =
  3. 3.15 × 16 =
  4. 4.22 × 55 =
  5. 5.12 × 75 =
  6. 6.125 × 18 =
  7. 7.15 × 22 =
  8. 8.8 × 75 =
  9. 9.16 × 65 =
  10. 10.15 × 38 =
  11. 11.75 × 22 =
  12. 12.25 × 14 =
  13. 13.75 × 12 =
  14. 14.20 × 15 =
  15. 15.22 × 65 =
  16. 16.35 × 26 =
  17. 17.40 × 65 =
  18. 18.65 × 8 =
  19. 19.12 × 35 =
  20. 20.35 × 38 =
  21. 21.75 × 36 =
  22. 22.36 × 45 =
  23. 23.36 × 75 =
  24. 24.15 × 28 =
  25. 25.65 × 22 =
  26. 26.32 × 25 =
  27. 27.45 × 26 =
  28. 28.26 × 125 =
  29. 29.45 × 18 =
  30. 30.65 × 6 =
  31. 31.125 × 8 =
  32. 32.25 × 6 =
  33. 33.35 × 20 =
  34. 34.125 × 36 =
  35. 35.16 × 125 =
  36. 36.45 × 20 =
  37. 37.55 × 28 =
  38. 38.22 × 35 =
  39. 39.65 × 14 =
  40. 40.55 × 38 =

Answer key

  1. 2090
  2. 520
  3. 240
  4. 1210
  5. 900
  6. 2250
  7. 330
  8. 600
  9. 1040
  10. 570
  11. 1650
  12. 350
  13. 900
  14. 300
  15. 1430
  16. 910
  17. 2600
  18. 520
  19. 420
  20. 1330
  21. 2700
  22. 1620
  23. 2700
  24. 420
  25. 1430
  26. 800
  27. 1170
  28. 3250
  29. 810
  30. 390
  31. 1000
  32. 150
  33. 700
  34. 4500
  35. 2000
  36. 900
  37. 1540
  38. 770
  39. 910
  40. 2090

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