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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 124 · 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. 1.35 × 28 =
  2. 2.15 × 16 =
  3. 3.15 × 38 =
  4. 4.20 × 45 =
  5. 5.18 × 75 =
  6. 6.15 × 26 =
  7. 7.75 × 10 =
  8. 8.65 × 32 =
  9. 9.22 × 35 =
  10. 10.55 × 14 =
  11. 11.75 × 38 =
  12. 12.36 × 15 =
  13. 13.55 × 14 =
  14. 14.14 × 125 =
  15. 15.25 × 12 =
  16. 16.55 × 8 =
  17. 17.14 × 125 =
  18. 18.75 × 32 =
  19. 19.6 × 25 =
  20. 20.45 × 18 =
  21. 21.125 × 36 =
  22. 22.35 × 32 =
  23. 23.6 × 35 =
  24. 24.25 × 22 =
  25. 25.125 × 18 =
  26. 26.20 × 35 =
  27. 27.125 × 22 =
  28. 28.125 × 32 =
  29. 29.15 × 14 =
  30. 30.35 × 30 =
  31. 31.34 × 35 =
  32. 32.125 × 40 =
  33. 33.35 × 12 =
  34. 34.26 × 55 =
  35. 35.10 × 75 =
  36. 36.36 × 35 =
  37. 37.10 × 35 =
  38. 38.30 × 125 =
  39. 39.25 × 28 =
  40. 40.26 × 125 =

Answer key

  1. 980
  2. 240
  3. 570
  4. 900
  5. 1350
  6. 390
  7. 750
  8. 2080
  9. 770
  10. 770
  11. 2850
  12. 540
  13. 770
  14. 1750
  15. 300
  16. 440
  17. 1750
  18. 2400
  19. 150
  20. 810
  21. 4500
  22. 1120
  23. 210
  24. 550
  25. 2250
  26. 700
  27. 2750
  28. 4000
  29. 210
  30. 1050
  31. 1190
  32. 5000
  33. 420
  34. 1430
  35. 750
  36. 1260
  37. 350
  38. 3750
  39. 700
  40. 3250

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