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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 668 · 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. 1.117 × 4 =
  2. 2.21 × 8 =
  3. 3.68 × 4 =
  4. 4.55 × 4 =
  5. 5.53 × 8 =
  6. 6.30 × 4 =
  7. 7.14 × 8 =
  8. 8.53 × 8 =
  9. 9.53 × 8 =
  10. 10.38 × 8 =
  11. 11.124 × 4 =
  12. 12.23 × 8 =
  13. 13.25 × 8 =
  14. 14.24 × 8 =
  15. 15.47 × 4 =
  16. 16.104 × 4 =
  17. 17.71 × 8 =
  18. 18.103 × 4 =
  19. 19.64 × 8 =
  20. 20.15 × 8 =
  21. 21.26 × 8 =
  22. 22.58 × 4 =
  23. 23.76 × 4 =
  24. 24.17 × 4 =
  25. 25.146 × 4 =
  26. 26.14 × 8 =
  27. 27.47 × 4 =
  28. 28.69 × 8 =
  29. 29.70 × 8 =
  30. 30.146 × 4 =
  31. 31.62 × 8 =
  32. 32.39 × 8 =
  33. 33.153 × 4 =
  34. 34.36 × 4 =
  35. 35.94 × 4 =
  36. 36.46 × 8 =
  37. 37.63 × 8 =
  38. 38.149 × 4 =
  39. 39.29 × 8 =
  40. 40.75 × 4 =

Answer key

  1. 468
  2. 168
  3. 272
  4. 220
  5. 424
  6. 120
  7. 112
  8. 424
  9. 424
  10. 304
  11. 496
  12. 184
  13. 200
  14. 192
  15. 188
  16. 416
  17. 568
  18. 412
  19. 512
  20. 120
  21. 208
  22. 232
  23. 304
  24. 68
  25. 584
  26. 112
  27. 188
  28. 552
  29. 560
  30. 584
  31. 496
  32. 312
  33. 612
  34. 144
  35. 376
  36. 368
  37. 504
  38. 596
  39. 232
  40. 300

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