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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 273 · 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. 1.53 × 4 =
  2. 2.92 × 4 =
  3. 3.89 × 4 =
  4. 4.152 × 4 =
  5. 5.33 × 8 =
  6. 6.20 × 8 =
  7. 7.73 × 4 =
  8. 8.136 × 4 =
  9. 9.49 × 4 =
  10. 10.131 × 4 =
  11. 11.122 × 4 =
  12. 12.19 × 4 =
  13. 13.14 × 8 =
  14. 14.43 × 8 =
  15. 15.61 × 4 =
  16. 16.97 × 4 =
  17. 17.88 × 4 =
  18. 18.86 × 4 =
  19. 19.62 × 8 =
  20. 20.43 × 4 =
  21. 21.20 × 8 =
  22. 22.67 × 4 =
  23. 23.68 × 4 =
  24. 24.146 × 4 =
  25. 25.13 × 8 =
  26. 26.32 × 8 =
  27. 27.49 × 4 =
  28. 28.125 × 4 =
  29. 29.82 × 4 =
  30. 30.66 × 8 =
  31. 31.34 × 8 =
  32. 32.74 × 8 =
  33. 33.109 × 4 =
  34. 34.154 × 4 =
  35. 35.111 × 4 =
  36. 36.63 × 4 =
  37. 37.66 × 4 =
  38. 38.21 × 8 =
  39. 39.39 × 8 =
  40. 40.63 × 8 =

Answer key

  1. 212
  2. 368
  3. 356
  4. 608
  5. 264
  6. 160
  7. 292
  8. 544
  9. 196
  10. 524
  11. 488
  12. 76
  13. 112
  14. 344
  15. 244
  16. 388
  17. 352
  18. 344
  19. 496
  20. 172
  21. 160
  22. 268
  23. 272
  24. 584
  25. 104
  26. 256
  27. 196
  28. 500
  29. 328
  30. 528
  31. 272
  32. 592
  33. 436
  34. 616
  35. 444
  36. 252
  37. 264
  38. 168
  39. 312
  40. 504

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