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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 682 · 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. 1.24 × 45 =
  2. 2.45 × 34 =
  3. 3.55 × 26 =
  4. 4.40 × 35 =
  5. 5.10 × 75 =
  6. 6.15 × 20 =
  7. 7.25 × 20 =
  8. 8.38 × 55 =
  9. 9.30 × 125 =
  10. 10.25 × 16 =
  11. 11.125 × 26 =
  12. 12.35 × 20 =
  13. 13.15 × 22 =
  14. 14.20 × 55 =
  15. 15.65 × 18 =
  16. 16.75 × 32 =
  17. 17.15 × 38 =
  18. 18.12 × 55 =
  19. 19.75 × 6 =
  20. 20.6 × 45 =
  21. 21.40 × 55 =
  22. 22.8 × 25 =
  23. 23.6 × 25 =
  24. 24.22 × 45 =
  25. 25.65 × 12 =
  26. 26.15 × 30 =
  27. 27.65 × 28 =
  28. 28.65 × 8 =
  29. 29.40 × 125 =
  30. 30.25 × 38 =
  31. 31.38 × 15 =
  32. 32.30 × 125 =
  33. 33.38 × 75 =
  34. 34.45 × 20 =
  35. 35.34 × 75 =
  36. 36.55 × 24 =
  37. 37.18 × 15 =
  38. 38.32 × 125 =
  39. 39.38 × 25 =
  40. 40.45 × 16 =

Answer key

  1. 1080
  2. 1530
  3. 1430
  4. 1400
  5. 750
  6. 300
  7. 500
  8. 2090
  9. 3750
  10. 400
  11. 3250
  12. 700
  13. 330
  14. 1100
  15. 1170
  16. 2400
  17. 570
  18. 660
  19. 450
  20. 270
  21. 2200
  22. 200
  23. 150
  24. 990
  25. 780
  26. 450
  27. 1820
  28. 520
  29. 5000
  30. 950
  31. 570
  32. 3750
  33. 2850
  34. 900
  35. 2550
  36. 1320
  37. 270
  38. 4000
  39. 950
  40. 720

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