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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 794 · 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. 1.32 × 35 =
  2. 2.30 × 45 =
  3. 3.30 × 15 =
  4. 4.38 × 35 =
  5. 5.14 × 45 =
  6. 6.125 × 22 =
  7. 7.35 × 22 =
  8. 8.65 × 32 =
  9. 9.45 × 28 =
  10. 10.32 × 45 =
  11. 11.35 × 38 =
  12. 12.40 × 55 =
  13. 13.14 × 125 =
  14. 14.35 × 38 =
  15. 15.25 × 24 =
  16. 16.35 × 40 =
  17. 17.6 × 15 =
  18. 18.55 × 16 =
  19. 19.24 × 35 =
  20. 20.18 × 45 =
  21. 21.36 × 65 =
  22. 22.15 × 26 =
  23. 23.8 × 125 =
  24. 24.40 × 35 =
  25. 25.125 × 18 =
  26. 26.75 × 22 =
  27. 27.55 × 24 =
  28. 28.55 × 38 =
  29. 29.28 × 125 =
  30. 30.35 × 6 =
  31. 31.15 × 8 =
  32. 32.45 × 12 =
  33. 33.26 × 75 =
  34. 34.18 × 15 =
  35. 35.34 × 25 =
  36. 36.22 × 125 =
  37. 37.22 × 25 =
  38. 38.45 × 18 =
  39. 39.22 × 125 =
  40. 40.125 × 40 =

Answer key

  1. 1120
  2. 1350
  3. 450
  4. 1330
  5. 630
  6. 2750
  7. 770
  8. 2080
  9. 1260
  10. 1440
  11. 1330
  12. 2200
  13. 1750
  14. 1330
  15. 600
  16. 1400
  17. 90
  18. 880
  19. 840
  20. 810
  21. 2340
  22. 390
  23. 1000
  24. 1400
  25. 2250
  26. 1650
  27. 1320
  28. 2090
  29. 3500
  30. 210
  31. 120
  32. 540
  33. 1950
  34. 270
  35. 850
  36. 2750
  37. 550
  38. 810
  39. 2750
  40. 5000

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