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Doubling and Halving Worksheet

Tables & multiplication lesson 14: Doubling and halving · Set 893 · 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. 1.8 × 15 =
  2. 2.25 × 12 =
  3. 3.25 × 10 =
  4. 4.65 × 26 =
  5. 5.16 × 125 =
  6. 6.75 × 22 =
  7. 7.25 × 34 =
  8. 8.40 × 55 =
  9. 9.38 × 65 =
  10. 10.22 × 125 =
  11. 11.35 × 14 =
  12. 12.55 × 40 =
  13. 13.6 × 45 =
  14. 14.25 × 32 =
  15. 15.30 × 65 =
  16. 16.18 × 45 =
  17. 17.12 × 65 =
  18. 18.36 × 15 =
  19. 19.55 × 40 =
  20. 20.15 × 8 =
  21. 21.18 × 125 =
  22. 22.15 × 26 =
  23. 23.36 × 125 =
  24. 24.45 × 34 =
  25. 25.24 × 35 =
  26. 26.25 × 36 =
  27. 27.75 × 8 =
  28. 28.6 × 25 =
  29. 29.20 × 125 =
  30. 30.24 × 25 =
  31. 31.18 × 55 =
  32. 32.22 × 45 =
  33. 33.10 × 25 =
  34. 34.65 × 34 =
  35. 35.15 × 8 =
  36. 36.25 × 38 =
  37. 37.14 × 15 =
  38. 38.25 × 18 =
  39. 39.35 × 22 =
  40. 40.65 × 26 =

Answer key

  1. 120
  2. 300
  3. 250
  4. 1690
  5. 2000
  6. 1650
  7. 850
  8. 2200
  9. 2470
  10. 2750
  11. 490
  12. 2200
  13. 270
  14. 800
  15. 1950
  16. 810
  17. 780
  18. 540
  19. 2200
  20. 120
  21. 2250
  22. 390
  23. 4500
  24. 1530
  25. 840
  26. 900
  27. 600
  28. 150
  29. 2500
  30. 600
  31. 990
  32. 990
  33. 250
  34. 2210
  35. 120
  36. 950
  37. 210
  38. 450
  39. 770
  40. 1690

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