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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 265 · 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. 1.15 × 22 =
  2. 2.12 × 25 =
  3. 3.10 × 65 =
  4. 4.40 × 15 =
  5. 5.14 × 55 =
  6. 6.40 × 125 =
  7. 7.45 × 30 =
  8. 8.45 × 14 =
  9. 9.18 × 65 =
  10. 10.125 × 26 =
  11. 11.125 × 10 =
  12. 12.15 × 10 =
  13. 13.15 × 14 =
  14. 14.25 × 16 =
  15. 15.15 × 6 =
  16. 16.45 × 28 =
  17. 17.75 × 16 =
  18. 18.16 × 65 =
  19. 19.55 × 30 =
  20. 20.25 × 28 =
  21. 21.125 × 34 =
  22. 22.25 × 8 =
  23. 23.6 × 25 =
  24. 24.75 × 28 =
  25. 25.10 × 45 =
  26. 26.38 × 65 =
  27. 27.65 × 38 =
  28. 28.65 × 22 =
  29. 29.125 × 38 =
  30. 30.125 × 30 =
  31. 31.55 × 24 =
  32. 32.16 × 15 =
  33. 33.15 × 38 =
  34. 34.20 × 15 =
  35. 35.125 × 16 =
  36. 36.75 × 6 =
  37. 37.20 × 65 =
  38. 38.35 × 6 =
  39. 39.6 × 65 =
  40. 40.34 × 75 =

Answer key

  1. 330
  2. 300
  3. 650
  4. 600
  5. 770
  6. 5000
  7. 1350
  8. 630
  9. 1170
  10. 3250
  11. 1250
  12. 150
  13. 210
  14. 400
  15. 90
  16. 1260
  17. 1200
  18. 1040
  19. 1650
  20. 700
  21. 4250
  22. 200
  23. 150
  24. 2100
  25. 450
  26. 2470
  27. 2470
  28. 1430
  29. 4750
  30. 3750
  31. 1320
  32. 240
  33. 570
  34. 300
  35. 2000
  36. 450
  37. 1300
  38. 210
  39. 390
  40. 2550

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