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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 671 · 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. 1.44 × 4 =
  2. 2.57 × 8 =
  3. 3.19 × 8 =
  4. 4.34 × 8 =
  5. 5.74 × 8 =
  6. 6.57 × 8 =
  7. 7.99 × 4 =
  8. 8.51 × 8 =
  9. 9.134 × 4 =
  10. 10.57 × 8 =
  11. 11.75 × 8 =
  12. 12.30 × 8 =
  13. 13.18 × 4 =
  14. 14.50 × 8 =
  15. 15.60 × 8 =
  16. 16.99 × 4 =
  17. 17.54 × 8 =
  18. 18.17 × 8 =
  19. 19.118 × 4 =
  20. 20.61 × 8 =
  21. 21.21 × 4 =
  22. 22.148 × 4 =
  23. 23.72 × 4 =
  24. 24.64 × 8 =
  25. 25.14 × 8 =
  26. 26.40 × 4 =
  27. 27.37 × 4 =
  28. 28.127 × 4 =
  29. 29.61 × 4 =
  30. 30.76 × 4 =
  31. 31.38 × 4 =
  32. 32.14 × 8 =
  33. 33.86 × 4 =
  34. 34.79 × 4 =
  35. 35.37 × 8 =
  36. 36.66 × 4 =
  37. 37.46 × 4 =
  38. 38.14 × 4 =
  39. 39.48 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 176
  2. 456
  3. 152
  4. 272
  5. 592
  6. 456
  7. 396
  8. 408
  9. 536
  10. 456
  11. 600
  12. 240
  13. 72
  14. 400
  15. 480
  16. 396
  17. 432
  18. 136
  19. 472
  20. 488
  21. 84
  22. 592
  23. 288
  24. 512
  25. 112
  26. 160
  27. 148
  28. 508
  29. 244
  30. 304
  31. 152
  32. 112
  33. 344
  34. 316
  35. 296
  36. 264
  37. 184
  38. 56
  39. 384
  40. 200

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