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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 694 · 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. 1.56 × 4 =
  2. 2.59 × 4 =
  3. 3.157 × 4 =
  4. 4.15 × 8 =
  5. 5.149 × 4 =
  6. 6.19 × 8 =
  7. 7.157 × 4 =
  8. 8.140 × 4 =
  9. 9.107 × 4 =
  10. 10.84 × 4 =
  11. 11.90 × 4 =
  12. 12.135 × 4 =
  13. 13.147 × 4 =
  14. 14.24 × 8 =
  15. 15.127 × 4 =
  16. 16.46 × 4 =
  17. 17.114 × 4 =
  18. 18.146 × 4 =
  19. 19.69 × 8 =
  20. 20.16 × 8 =
  21. 21.24 × 8 =
  22. 22.55 × 8 =
  23. 23.62 × 8 =
  24. 24.34 × 4 =
  25. 25.149 × 4 =
  26. 26.109 × 4 =
  27. 27.43 × 8 =
  28. 28.53 × 8 =
  29. 29.107 × 4 =
  30. 30.65 × 8 =
  31. 31.113 × 4 =
  32. 32.70 × 8 =
  33. 33.57 × 8 =
  34. 34.53 × 4 =
  35. 35.151 × 4 =
  36. 36.41 × 8 =
  37. 37.72 × 8 =
  38. 38.80 × 4 =
  39. 39.61 × 4 =
  40. 40.107 × 4 =

Answer key

  1. 224
  2. 236
  3. 628
  4. 120
  5. 596
  6. 152
  7. 628
  8. 560
  9. 428
  10. 336
  11. 360
  12. 540
  13. 588
  14. 192
  15. 508
  16. 184
  17. 456
  18. 584
  19. 552
  20. 128
  21. 192
  22. 440
  23. 496
  24. 136
  25. 596
  26. 436
  27. 344
  28. 424
  29. 428
  30. 520
  31. 452
  32. 560
  33. 456
  34. 212
  35. 604
  36. 328
  37. 576
  38. 320
  39. 244
  40. 428

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