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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 450 · 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. 1.25 × 12 =
  2. 2.45 × 30 =
  3. 3.24 × 65 =
  4. 4.30 × 25 =
  5. 5.34 × 45 =
  6. 6.16 × 35 =
  7. 7.15 × 12 =
  8. 8.55 × 30 =
  9. 9.75 × 6 =
  10. 10.35 × 10 =
  11. 11.125 × 8 =
  12. 12.14 × 55 =
  13. 13.55 × 30 =
  14. 14.34 × 75 =
  15. 15.6 × 75 =
  16. 16.45 × 34 =
  17. 17.65 × 26 =
  18. 18.65 × 10 =
  19. 19.75 × 30 =
  20. 20.35 × 20 =
  21. 21.14 × 15 =
  22. 22.14 × 25 =
  23. 23.15 × 8 =
  24. 24.35 × 38 =
  25. 25.75 × 30 =
  26. 26.32 × 65 =
  27. 27.38 × 15 =
  28. 28.6 × 55 =
  29. 29.75 × 8 =
  30. 30.12 × 55 =
  31. 31.45 × 20 =
  32. 32.65 × 26 =
  33. 33.14 × 125 =
  34. 34.15 × 18 =
  35. 35.8 × 125 =
  36. 36.35 × 26 =
  37. 37.24 × 25 =
  38. 38.25 × 24 =
  39. 39.8 × 35 =
  40. 40.15 × 22 =

Answer key

  1. 300
  2. 1350
  3. 1560
  4. 750
  5. 1530
  6. 560
  7. 180
  8. 1650
  9. 450
  10. 350
  11. 1000
  12. 770
  13. 1650
  14. 2550
  15. 450
  16. 1530
  17. 1690
  18. 650
  19. 2250
  20. 700
  21. 210
  22. 350
  23. 120
  24. 1330
  25. 2250
  26. 2080
  27. 570
  28. 330
  29. 600
  30. 660
  31. 900
  32. 1690
  33. 1750
  34. 270
  35. 1000
  36. 910
  37. 600
  38. 600
  39. 280
  40. 330

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