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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 76 · 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. 1.38 × 15 =
  2. 2.15 × 36 =
  3. 3.20 × 125 =
  4. 4.65 × 16 =
  5. 5.15 × 6 =
  6. 6.65 × 20 =
  7. 7.38 × 35 =
  8. 8.65 × 8 =
  9. 9.24 × 25 =
  10. 10.30 × 35 =
  11. 11.55 × 6 =
  12. 12.18 × 15 =
  13. 13.8 × 25 =
  14. 14.15 × 34 =
  15. 15.30 × 125 =
  16. 16.35 × 26 =
  17. 17.8 × 25 =
  18. 18.125 × 14 =
  19. 19.26 × 15 =
  20. 20.24 × 125 =
  21. 21.15 × 24 =
  22. 22.15 × 34 =
  23. 23.26 × 25 =
  24. 24.15 × 8 =
  25. 25.12 × 15 =
  26. 26.35 × 18 =
  27. 27.35 × 6 =
  28. 28.45 × 12 =
  29. 29.36 × 35 =
  30. 30.24 × 55 =
  31. 31.10 × 75 =
  32. 32.30 × 65 =
  33. 33.45 × 8 =
  34. 34.45 × 36 =
  35. 35.65 × 34 =
  36. 36.26 × 45 =
  37. 37.55 × 30 =
  38. 38.32 × 15 =
  39. 39.25 × 12 =
  40. 40.18 × 25 =

Answer key

  1. 570
  2. 540
  3. 2500
  4. 1040
  5. 90
  6. 1300
  7. 1330
  8. 520
  9. 600
  10. 1050
  11. 330
  12. 270
  13. 200
  14. 510
  15. 3750
  16. 910
  17. 200
  18. 1750
  19. 390
  20. 3000
  21. 360
  22. 510
  23. 650
  24. 120
  25. 180
  26. 630
  27. 210
  28. 540
  29. 1260
  30. 1320
  31. 750
  32. 1950
  33. 360
  34. 1620
  35. 2210
  36. 1170
  37. 1650
  38. 480
  39. 300
  40. 450

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