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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 717 · 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. 1.40 × 35 =
  2. 2.10 × 45 =
  3. 3.26 × 45 =
  4. 4.25 × 8 =
  5. 5.125 × 14 =
  6. 6.65 × 6 =
  7. 7.15 × 22 =
  8. 8.6 × 25 =
  9. 9.75 × 32 =
  10. 10.30 × 25 =
  11. 11.45 × 30 =
  12. 12.75 × 8 =
  13. 13.28 × 15 =
  14. 14.15 × 38 =
  15. 15.75 × 28 =
  16. 16.26 × 55 =
  17. 17.24 × 65 =
  18. 18.30 × 15 =
  19. 19.15 × 38 =
  20. 20.65 × 22 =
  21. 21.65 × 20 =
  22. 22.16 × 65 =
  23. 23.15 × 40 =
  24. 24.35 × 32 =
  25. 25.55 × 22 =
  26. 26.25 × 12 =
  27. 27.18 × 15 =
  28. 28.65 × 6 =
  29. 29.45 × 28 =
  30. 30.28 × 25 =
  31. 31.25 × 18 =
  32. 32.45 × 10 =
  33. 33.55 × 30 =
  34. 34.125 × 40 =
  35. 35.125 × 36 =
  36. 36.65 × 22 =
  37. 37.20 × 125 =
  38. 38.35 × 16 =
  39. 39.30 × 55 =
  40. 40.22 × 35 =

Answer key

  1. 1400
  2. 450
  3. 1170
  4. 200
  5. 1750
  6. 390
  7. 330
  8. 150
  9. 2400
  10. 750
  11. 1350
  12. 600
  13. 420
  14. 570
  15. 2100
  16. 1430
  17. 1560
  18. 450
  19. 570
  20. 1430
  21. 1300
  22. 1040
  23. 600
  24. 1120
  25. 1210
  26. 300
  27. 270
  28. 390
  29. 1260
  30. 700
  31. 450
  32. 450
  33. 1650
  34. 5000
  35. 4500
  36. 1430
  37. 2500
  38. 560
  39. 1650
  40. 770

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