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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 650 · 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. 1.22 × 45 =
  2. 2.25 × 18 =
  3. 3.45 × 26 =
  4. 4.22 × 75 =
  5. 5.18 × 75 =
  6. 6.38 × 15 =
  7. 7.25 × 12 =
  8. 8.75 × 14 =
  9. 9.12 × 55 =
  10. 10.12 × 35 =
  11. 11.25 × 10 =
  12. 12.14 × 55 =
  13. 13.14 × 75 =
  14. 14.15 × 6 =
  15. 15.16 × 65 =
  16. 16.35 × 14 =
  17. 17.24 × 45 =
  18. 18.14 × 75 =
  19. 19.25 × 38 =
  20. 20.55 × 16 =
  21. 21.35 × 24 =
  22. 22.45 × 30 =
  23. 23.34 × 15 =
  24. 24.125 × 14 =
  25. 25.40 × 45 =
  26. 26.30 × 15 =
  27. 27.25 × 12 =
  28. 28.75 × 14 =
  29. 29.20 × 35 =
  30. 30.45 × 30 =
  31. 31.32 × 35 =
  32. 32.125 × 20 =
  33. 33.35 × 32 =
  34. 34.14 × 45 =
  35. 35.35 × 12 =
  36. 36.75 × 36 =
  37. 37.12 × 55 =
  38. 38.45 × 8 =
  39. 39.38 × 25 =
  40. 40.38 × 35 =

Answer key

  1. 990
  2. 450
  3. 1170
  4. 1650
  5. 1350
  6. 570
  7. 300
  8. 1050
  9. 660
  10. 420
  11. 250
  12. 770
  13. 1050
  14. 90
  15. 1040
  16. 490
  17. 1080
  18. 1050
  19. 950
  20. 880
  21. 840
  22. 1350
  23. 510
  24. 1750
  25. 1800
  26. 450
  27. 300
  28. 1050
  29. 700
  30. 1350
  31. 1120
  32. 2500
  33. 1120
  34. 630
  35. 420
  36. 2700
  37. 660
  38. 360
  39. 950
  40. 1330

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