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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 281 · 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. 1.28 × 125 =
  2. 2.55 × 28 =
  3. 3.18 × 25 =
  4. 4.35 × 16 =
  5. 5.65 × 16 =
  6. 6.125 × 38 =
  7. 7.25 × 38 =
  8. 8.125 × 6 =
  9. 9.12 × 75 =
  10. 10.35 × 40 =
  11. 11.65 × 22 =
  12. 12.26 × 35 =
  13. 13.35 × 36 =
  14. 14.25 × 40 =
  15. 15.12 × 125 =
  16. 16.15 × 12 =
  17. 17.25 × 26 =
  18. 18.25 × 6 =
  19. 19.32 × 125 =
  20. 20.65 × 16 =
  21. 21.65 × 32 =
  22. 22.24 × 15 =
  23. 23.10 × 25 =
  24. 24.125 × 10 =
  25. 25.30 × 15 =
  26. 26.45 × 34 =
  27. 27.10 × 55 =
  28. 28.75 × 38 =
  29. 29.75 × 22 =
  30. 30.14 × 55 =
  31. 31.25 × 8 =
  32. 32.8 × 65 =
  33. 33.55 × 12 =
  34. 34.28 × 75 =
  35. 35.18 × 25 =
  36. 36.12 × 75 =
  37. 37.35 × 16 =
  38. 38.22 × 75 =
  39. 39.15 × 20 =
  40. 40.35 × 30 =

Answer key

  1. 3500
  2. 1540
  3. 450
  4. 560
  5. 1040
  6. 4750
  7. 950
  8. 750
  9. 900
  10. 1400
  11. 1430
  12. 910
  13. 1260
  14. 1000
  15. 1500
  16. 180
  17. 650
  18. 150
  19. 4000
  20. 1040
  21. 2080
  22. 360
  23. 250
  24. 1250
  25. 450
  26. 1530
  27. 550
  28. 2850
  29. 1650
  30. 770
  31. 200
  32. 520
  33. 660
  34. 2100
  35. 450
  36. 900
  37. 560
  38. 1650
  39. 300
  40. 1050

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