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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 60 · 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. 1.43 × 8 =
  2. 2.70 × 4 =
  3. 3.51 × 8 =
  4. 4.35 × 4 =
  5. 5.18 × 4 =
  6. 6.61 × 4 =
  7. 7.89 × 4 =
  8. 8.118 × 4 =
  9. 9.54 × 8 =
  10. 10.103 × 4 =
  11. 11.17 × 4 =
  12. 12.99 × 4 =
  13. 13.61 × 4 =
  14. 14.75 × 4 =
  15. 15.41 × 8 =
  16. 16.35 × 8 =
  17. 17.86 × 4 =
  18. 18.67 × 4 =
  19. 19.17 × 8 =
  20. 20.63 × 4 =
  21. 21.148 × 4 =
  22. 22.114 × 4 =
  23. 23.113 × 4 =
  24. 24.127 × 4 =
  25. 25.53 × 8 =
  26. 26.68 × 4 =
  27. 27.42 × 4 =
  28. 28.50 × 4 =
  29. 29.61 × 8 =
  30. 30.51 × 4 =
  31. 31.18 × 4 =
  32. 32.25 × 4 =
  33. 33.14 × 8 =
  34. 34.95 × 4 =
  35. 35.143 × 4 =
  36. 36.151 × 4 =
  37. 37.53 × 8 =
  38. 38.86 × 4 =
  39. 39.21 × 8 =
  40. 40.83 × 4 =

Answer key

  1. 344
  2. 280
  3. 408
  4. 140
  5. 72
  6. 244
  7. 356
  8. 472
  9. 432
  10. 412
  11. 68
  12. 396
  13. 244
  14. 300
  15. 328
  16. 280
  17. 344
  18. 268
  19. 136
  20. 252
  21. 592
  22. 456
  23. 452
  24. 508
  25. 424
  26. 272
  27. 168
  28. 200
  29. 488
  30. 204
  31. 72
  32. 100
  33. 112
  34. 380
  35. 572
  36. 604
  37. 424
  38. 344
  39. 168
  40. 332

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