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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 796 · 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. 1.55 × 24 =
  2. 2.6 × 75 =
  3. 3.14 × 15 =
  4. 4.25 × 36 =
  5. 5.65 × 20 =
  6. 6.35 × 22 =
  7. 7.38 × 45 =
  8. 8.34 × 25 =
  9. 9.18 × 125 =
  10. 10.35 × 38 =
  11. 11.28 × 35 =
  12. 12.6 × 25 =
  13. 13.12 × 125 =
  14. 14.25 × 38 =
  15. 15.65 × 16 =
  16. 16.125 × 26 =
  17. 17.45 × 28 =
  18. 18.55 × 32 =
  19. 19.75 × 28 =
  20. 20.55 × 6 =
  21. 21.20 × 125 =
  22. 22.6 × 75 =
  23. 23.125 × 38 =
  24. 24.125 × 28 =
  25. 25.35 × 16 =
  26. 26.45 × 6 =
  27. 27.26 × 15 =
  28. 28.25 × 20 =
  29. 29.12 × 55 =
  30. 30.55 × 12 =
  31. 31.75 × 20 =
  32. 32.55 × 6 =
  33. 33.20 × 55 =
  34. 34.55 × 30 =
  35. 35.45 × 34 =
  36. 36.125 × 36 =
  37. 37.75 × 34 =
  38. 38.75 × 10 =
  39. 39.36 × 65 =
  40. 40.25 × 20 =

Answer key

  1. 1320
  2. 450
  3. 210
  4. 900
  5. 1300
  6. 770
  7. 1710
  8. 850
  9. 2250
  10. 1330
  11. 980
  12. 150
  13. 1500
  14. 950
  15. 1040
  16. 3250
  17. 1260
  18. 1760
  19. 2100
  20. 330
  21. 2500
  22. 450
  23. 4750
  24. 3500
  25. 560
  26. 270
  27. 390
  28. 500
  29. 660
  30. 660
  31. 1500
  32. 330
  33. 1100
  34. 1650
  35. 1530
  36. 4500
  37. 2550
  38. 750
  39. 2340
  40. 500

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