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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 736 · 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. 1.30 × 125 =
  2. 2.14 × 15 =
  3. 3.15 × 38 =
  4. 4.26 × 55 =
  5. 5.55 × 24 =
  6. 6.45 × 14 =
  7. 7.10 × 25 =
  8. 8.65 × 12 =
  9. 9.75 × 32 =
  10. 10.55 × 8 =
  11. 11.45 × 8 =
  12. 12.14 × 25 =
  13. 13.30 × 65 =
  14. 14.25 × 10 =
  15. 15.26 × 15 =
  16. 16.75 × 30 =
  17. 17.45 × 6 =
  18. 18.35 × 20 =
  19. 19.75 × 34 =
  20. 20.20 × 65 =
  21. 21.25 × 10 =
  22. 22.45 × 10 =
  23. 23.45 × 30 =
  24. 24.75 × 34 =
  25. 25.75 × 26 =
  26. 26.25 × 28 =
  27. 27.15 × 6 =
  28. 28.125 × 12 =
  29. 29.28 × 25 =
  30. 30.34 × 35 =
  31. 31.75 × 32 =
  32. 32.45 × 14 =
  33. 33.45 × 6 =
  34. 34.125 × 24 =
  35. 35.15 × 20 =
  36. 36.25 × 18 =
  37. 37.55 × 26 =
  38. 38.55 × 8 =
  39. 39.16 × 15 =
  40. 40.6 × 55 =

Answer key

  1. 3750
  2. 210
  3. 570
  4. 1430
  5. 1320
  6. 630
  7. 250
  8. 780
  9. 2400
  10. 440
  11. 360
  12. 350
  13. 1950
  14. 250
  15. 390
  16. 2250
  17. 270
  18. 700
  19. 2550
  20. 1300
  21. 250
  22. 450
  23. 1350
  24. 2550
  25. 1950
  26. 700
  27. 90
  28. 1500
  29. 700
  30. 1190
  31. 2400
  32. 630
  33. 270
  34. 3000
  35. 300
  36. 450
  37. 1430
  38. 440
  39. 240
  40. 330

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