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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 340 · 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 × 55 =
  2. 2.36 × 15 =
  3. 3.65 × 14 =
  4. 4.45 × 12 =
  5. 5.40 × 55 =
  6. 6.8 × 125 =
  7. 7.15 × 32 =
  8. 8.75 × 34 =
  9. 9.32 × 15 =
  10. 10.65 × 36 =
  11. 11.125 × 12 =
  12. 12.20 × 65 =
  13. 13.25 × 28 =
  14. 14.32 × 25 =
  15. 15.40 × 25 =
  16. 16.26 × 25 =
  17. 17.6 × 25 =
  18. 18.24 × 25 =
  19. 19.16 × 15 =
  20. 20.45 × 10 =
  21. 21.25 × 38 =
  22. 22.15 × 36 =
  23. 23.125 × 10 =
  24. 24.32 × 75 =
  25. 25.55 × 8 =
  26. 26.75 × 30 =
  27. 27.25 × 36 =
  28. 28.65 × 32 =
  29. 29.6 × 35 =
  30. 30.38 × 35 =
  31. 31.15 × 10 =
  32. 32.75 × 20 =
  33. 33.12 × 35 =
  34. 34.32 × 25 =
  35. 35.25 × 36 =
  36. 36.75 × 28 =
  37. 37.75 × 36 =
  38. 38.15 × 40 =
  39. 39.45 × 36 =
  40. 40.25 × 18 =

Answer key

  1. 1210
  2. 540
  3. 910
  4. 540
  5. 2200
  6. 1000
  7. 480
  8. 2550
  9. 480
  10. 2340
  11. 1500
  12. 1300
  13. 700
  14. 800
  15. 1000
  16. 650
  17. 150
  18. 600
  19. 240
  20. 450
  21. 950
  22. 540
  23. 1250
  24. 2400
  25. 440
  26. 2250
  27. 900
  28. 2080
  29. 210
  30. 1330
  31. 150
  32. 1500
  33. 420
  34. 800
  35. 900
  36. 2100
  37. 2700
  38. 600
  39. 1620
  40. 450

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