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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 532 · 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. 1.75 × 14 =
  2. 2.75 × 40 =
  3. 3.18 × 75 =
  4. 4.75 × 28 =
  5. 5.36 × 35 =
  6. 6.12 × 15 =
  7. 7.35 × 6 =
  8. 8.36 × 25 =
  9. 9.65 × 36 =
  10. 10.18 × 65 =
  11. 11.35 × 14 =
  12. 12.16 × 45 =
  13. 13.25 × 36 =
  14. 14.15 × 36 =
  15. 15.6 × 65 =
  16. 16.20 × 35 =
  17. 17.26 × 35 =
  18. 18.16 × 55 =
  19. 19.8 × 25 =
  20. 20.75 × 12 =
  21. 21.30 × 45 =
  22. 22.75 × 22 =
  23. 23.26 × 45 =
  24. 24.12 × 125 =
  25. 25.20 × 25 =
  26. 26.36 × 45 =
  27. 27.8 × 25 =
  28. 28.25 × 6 =
  29. 29.55 × 8 =
  30. 30.40 × 65 =
  31. 31.125 × 32 =
  32. 32.14 × 75 =
  33. 33.30 × 125 =
  34. 34.75 × 34 =
  35. 35.35 × 10 =
  36. 36.15 × 24 =
  37. 37.16 × 65 =
  38. 38.25 × 6 =
  39. 39.75 × 16 =
  40. 40.25 × 28 =

Answer key

  1. 1050
  2. 3000
  3. 1350
  4. 2100
  5. 1260
  6. 180
  7. 210
  8. 900
  9. 2340
  10. 1170
  11. 490
  12. 720
  13. 900
  14. 540
  15. 390
  16. 700
  17. 910
  18. 880
  19. 200
  20. 900
  21. 1350
  22. 1650
  23. 1170
  24. 1500
  25. 500
  26. 1620
  27. 200
  28. 150
  29. 440
  30. 2600
  31. 4000
  32. 1050
  33. 3750
  34. 2550
  35. 350
  36. 360
  37. 1040
  38. 150
  39. 1200
  40. 700

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