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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 119 · 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. 1.158 × 4 =
  2. 2.55 × 4 =
  3. 3.35 × 4 =
  4. 4.16 × 8 =
  5. 5.29 × 8 =
  6. 6.31 × 8 =
  7. 7.73 × 8 =
  8. 8.61 × 4 =
  9. 9.43 × 8 =
  10. 10.85 × 4 =
  11. 11.51 × 8 =
  12. 12.21 × 4 =
  13. 13.105 × 4 =
  14. 14.56 × 8 =
  15. 15.133 × 4 =
  16. 16.57 × 8 =
  17. 17.62 × 8 =
  18. 18.46 × 4 =
  19. 19.22 × 4 =
  20. 20.78 × 4 =
  21. 21.33 × 8 =
  22. 22.77 × 4 =
  23. 23.33 × 8 =
  24. 24.87 × 4 =
  25. 25.52 × 4 =
  26. 26.151 × 4 =
  27. 27.85 × 4 =
  28. 28.64 × 8 =
  29. 29.21 × 8 =
  30. 30.79 × 4 =
  31. 31.27 × 8 =
  32. 32.46 × 8 =
  33. 33.36 × 4 =
  34. 34.154 × 4 =
  35. 35.60 × 8 =
  36. 36.17 × 8 =
  37. 37.53 × 4 =
  38. 38.66 × 8 =
  39. 39.53 × 4 =
  40. 40.21 × 8 =

Answer key

  1. 632
  2. 220
  3. 140
  4. 128
  5. 232
  6. 248
  7. 584
  8. 244
  9. 344
  10. 340
  11. 408
  12. 84
  13. 420
  14. 448
  15. 532
  16. 456
  17. 496
  18. 184
  19. 88
  20. 312
  21. 264
  22. 308
  23. 264
  24. 348
  25. 208
  26. 604
  27. 340
  28. 512
  29. 168
  30. 316
  31. 216
  32. 368
  33. 144
  34. 616
  35. 480
  36. 136
  37. 212
  38. 528
  39. 212
  40. 168

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