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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 819 · 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. 1.35 × 6 =
  2. 2.35 × 6 =
  3. 3.75 × 12 =
  4. 4.34 × 35 =
  5. 5.38 × 65 =
  6. 6.55 × 12 =
  7. 7.36 × 125 =
  8. 8.8 × 25 =
  9. 9.75 × 14 =
  10. 10.40 × 15 =
  11. 11.55 × 30 =
  12. 12.26 × 25 =
  13. 13.26 × 25 =
  14. 14.35 × 8 =
  15. 15.14 × 55 =
  16. 16.15 × 30 =
  17. 17.14 × 15 =
  18. 18.35 × 20 =
  19. 19.45 × 12 =
  20. 20.125 × 10 =
  21. 21.55 × 38 =
  22. 22.125 × 20 =
  23. 23.20 × 25 =
  24. 24.65 × 6 =
  25. 25.45 × 20 =
  26. 26.16 × 55 =
  27. 27.36 × 15 =
  28. 28.45 × 28 =
  29. 29.22 × 25 =
  30. 30.45 × 14 =
  31. 31.125 × 32 =
  32. 32.25 × 16 =
  33. 33.55 × 40 =
  34. 34.65 × 16 =
  35. 35.30 × 35 =
  36. 36.35 × 16 =
  37. 37.55 × 10 =
  38. 38.38 × 75 =
  39. 39.15 × 26 =
  40. 40.75 × 30 =

Answer key

  1. 210
  2. 210
  3. 900
  4. 1190
  5. 2470
  6. 660
  7. 4500
  8. 200
  9. 1050
  10. 600
  11. 1650
  12. 650
  13. 650
  14. 280
  15. 770
  16. 450
  17. 210
  18. 700
  19. 540
  20. 1250
  21. 2090
  22. 2500
  23. 500
  24. 390
  25. 900
  26. 880
  27. 540
  28. 1260
  29. 550
  30. 630
  31. 4000
  32. 400
  33. 2200
  34. 1040
  35. 1050
  36. 560
  37. 550
  38. 2850
  39. 390
  40. 2250

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