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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 735 · 40 questions
TalentJR

The fast method (Double up): × 4: double, then double again. × 8: double three times. To double a big number, double the tens and the ones separately and add: double 37 = 60 + 14 = 74.

NameDateTime takenScore ___ / 40
  1. 1.28 × 8 =
  2. 2.50 × 8 =
  3. 3.23 × 4 =
  4. 4.42 × 8 =
  5. 5.51 × 8 =
  6. 6.30 × 4 =
  7. 7.18 × 4 =
  8. 8.61 × 8 =
  9. 9.46 × 8 =
  10. 10.38 × 4 =
  11. 11.59 × 8 =
  12. 12.46 × 8 =
  13. 13.35 × 4 =
  14. 14.52 × 8 =
  15. 15.15 × 4 =
  16. 16.23 × 8 =
  17. 17.37 × 4 =
  18. 18.77 × 4 =
  19. 19.50 × 8 =
  20. 20.39 × 8 =
  21. 21.41 × 8 =
  22. 22.100 × 4 =
  23. 23.107 × 4 =
  24. 24.65 × 8 =
  25. 25.73 × 4 =
  26. 26.88 × 4 =
  27. 27.50 × 4 =
  28. 28.68 × 4 =
  29. 29.104 × 4 =
  30. 30.52 × 4 =
  31. 31.46 × 4 =
  32. 32.41 × 4 =
  33. 33.122 × 4 =
  34. 34.138 × 4 =
  35. 35.40 × 8 =
  36. 36.45 × 8 =
  37. 37.39 × 8 =
  38. 38.71 × 8 =
  39. 39.48 × 4 =
  40. 40.72 × 8 =

Answer key

  1. 224
  2. 400
  3. 92
  4. 336
  5. 408
  6. 120
  7. 72
  8. 488
  9. 368
  10. 152
  11. 472
  12. 368
  13. 140
  14. 416
  15. 60
  16. 184
  17. 148
  18. 308
  19. 400
  20. 312
  21. 328
  22. 400
  23. 428
  24. 520
  25. 292
  26. 352
  27. 200
  28. 272
  29. 416
  30. 208
  31. 184
  32. 164
  33. 488
  34. 552
  35. 320
  36. 360
  37. 312
  38. 568
  39. 192
  40. 576

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