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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 282 · 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. 1.20 × 8 =
  2. 2.138 × 4 =
  3. 3.36 × 4 =
  4. 4.108 × 4 =
  5. 5.106 × 4 =
  6. 6.148 × 4 =
  7. 7.147 × 4 =
  8. 8.31 × 8 =
  9. 9.52 × 8 =
  10. 10.63 × 8 =
  11. 11.20 × 8 =
  12. 12.75 × 8 =
  13. 13.115 × 4 =
  14. 14.28 × 4 =
  15. 15.24 × 8 =
  16. 16.81 × 4 =
  17. 17.80 × 4 =
  18. 18.140 × 4 =
  19. 19.143 × 4 =
  20. 20.34 × 4 =
  21. 21.138 × 4 =
  22. 22.51 × 8 =
  23. 23.20 × 8 =
  24. 24.43 × 8 =
  25. 25.38 × 8 =
  26. 26.77 × 4 =
  27. 27.53 × 4 =
  28. 28.14 × 8 =
  29. 29.51 × 4 =
  30. 30.43 × 8 =
  31. 31.41 × 8 =
  32. 32.28 × 4 =
  33. 33.19 × 8 =
  34. 34.17 × 8 =
  35. 35.92 × 4 =
  36. 36.123 × 4 =
  37. 37.67 × 8 =
  38. 38.137 × 4 =
  39. 39.36 × 8 =
  40. 40.49 × 8 =

Answer key

  1. 160
  2. 552
  3. 144
  4. 432
  5. 424
  6. 592
  7. 588
  8. 248
  9. 416
  10. 504
  11. 160
  12. 600
  13. 460
  14. 112
  15. 192
  16. 324
  17. 320
  18. 560
  19. 572
  20. 136
  21. 552
  22. 408
  23. 160
  24. 344
  25. 304
  26. 308
  27. 212
  28. 112
  29. 204
  30. 344
  31. 328
  32. 112
  33. 152
  34. 136
  35. 368
  36. 492
  37. 536
  38. 548
  39. 288
  40. 392

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