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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 426 · 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. 1.26 × 15 =
  2. 2.14 × 55 =
  3. 3.65 × 22 =
  4. 4.55 × 40 =
  5. 5.32 × 25 =
  6. 6.32 × 35 =
  7. 7.125 × 40 =
  8. 8.15 × 10 =
  9. 9.25 × 16 =
  10. 10.30 × 15 =
  11. 11.6 × 65 =
  12. 12.18 × 65 =
  13. 13.8 × 125 =
  14. 14.35 × 36 =
  15. 15.12 × 25 =
  16. 16.26 × 25 =
  17. 17.45 × 18 =
  18. 18.20 × 55 =
  19. 19.65 × 16 =
  20. 20.65 × 26 =
  21. 21.25 × 28 =
  22. 22.25 × 28 =
  23. 23.45 × 12 =
  24. 24.18 × 65 =
  25. 25.25 × 34 =
  26. 26.25 × 22 =
  27. 27.25 × 20 =
  28. 28.45 × 8 =
  29. 29.125 × 12 =
  30. 30.125 × 38 =
  31. 31.35 × 26 =
  32. 32.38 × 65 =
  33. 33.40 × 45 =
  34. 34.15 × 14 =
  35. 35.35 × 26 =
  36. 36.6 × 25 =
  37. 37.125 × 38 =
  38. 38.24 × 75 =
  39. 39.6 × 15 =
  40. 40.22 × 35 =

Answer key

  1. 390
  2. 770
  3. 1430
  4. 2200
  5. 800
  6. 1120
  7. 5000
  8. 150
  9. 400
  10. 450
  11. 390
  12. 1170
  13. 1000
  14. 1260
  15. 300
  16. 650
  17. 810
  18. 1100
  19. 1040
  20. 1690
  21. 700
  22. 700
  23. 540
  24. 1170
  25. 850
  26. 550
  27. 500
  28. 360
  29. 1500
  30. 4750
  31. 910
  32. 2470
  33. 1800
  34. 210
  35. 910
  36. 150
  37. 4750
  38. 1800
  39. 90
  40. 770

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