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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 23 · 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 × 35 =
  2. 2.35 × 28 =
  3. 3.18 × 125 =
  4. 4.75 × 36 =
  5. 5.8 × 15 =
  6. 6.65 × 12 =
  7. 7.55 × 36 =
  8. 8.22 × 75 =
  9. 9.28 × 25 =
  10. 10.15 × 24 =
  11. 11.30 × 55 =
  12. 12.125 × 16 =
  13. 13.25 × 38 =
  14. 14.15 × 32 =
  15. 15.18 × 35 =
  16. 16.8 × 55 =
  17. 17.40 × 35 =
  18. 18.38 × 75 =
  19. 19.22 × 65 =
  20. 20.24 × 25 =
  21. 21.30 × 55 =
  22. 22.34 × 35 =
  23. 23.125 × 34 =
  24. 24.10 × 15 =
  25. 25.24 × 45 =
  26. 26.25 × 36 =
  27. 27.20 × 45 =
  28. 28.25 × 32 =
  29. 29.55 × 10 =
  30. 30.125 × 8 =
  31. 31.75 × 30 =
  32. 32.26 × 125 =
  33. 33.36 × 55 =
  34. 34.8 × 25 =
  35. 35.28 × 15 =
  36. 36.20 × 35 =
  37. 37.75 × 30 =
  38. 38.38 × 35 =
  39. 39.125 × 18 =
  40. 40.16 × 65 =

Answer key

  1. 1330
  2. 980
  3. 2250
  4. 2700
  5. 120
  6. 780
  7. 1980
  8. 1650
  9. 700
  10. 360
  11. 1650
  12. 2000
  13. 950
  14. 480
  15. 630
  16. 440
  17. 1400
  18. 2850
  19. 1430
  20. 600
  21. 1650
  22. 1190
  23. 4250
  24. 150
  25. 1080
  26. 900
  27. 900
  28. 800
  29. 550
  30. 1000
  31. 2250
  32. 3250
  33. 1980
  34. 200
  35. 420
  36. 700
  37. 2250
  38. 1330
  39. 2250
  40. 1040

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