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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 271 · 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. 1.67 × 8 =
  2. 2.70 × 8 =
  3. 3.102 × 4 =
  4. 4.19 × 4 =
  5. 5.84 × 4 =
  6. 6.75 × 8 =
  7. 7.107 × 4 =
  8. 8.53 × 8 =
  9. 9.56 × 8 =
  10. 10.94 × 4 =
  11. 11.100 × 4 =
  12. 12.70 × 8 =
  13. 13.142 × 4 =
  14. 14.59 × 4 =
  15. 15.25 × 8 =
  16. 16.12 × 8 =
  17. 17.75 × 8 =
  18. 18.106 × 4 =
  19. 19.73 × 8 =
  20. 20.90 × 4 =
  21. 21.55 × 8 =
  22. 22.37 × 8 =
  23. 23.57 × 4 =
  24. 24.108 × 4 =
  25. 25.21 × 8 =
  26. 26.106 × 4 =
  27. 27.71 × 4 =
  28. 28.22 × 4 =
  29. 29.22 × 8 =
  30. 30.12 × 8 =
  31. 31.32 × 8 =
  32. 32.62 × 8 =
  33. 33.38 × 8 =
  34. 34.153 × 4 =
  35. 35.34 × 4 =
  36. 36.26 × 8 =
  37. 37.151 × 4 =
  38. 38.129 × 4 =
  39. 39.54 × 4 =
  40. 40.56 × 8 =

Answer key

  1. 536
  2. 560
  3. 408
  4. 76
  5. 336
  6. 600
  7. 428
  8. 424
  9. 448
  10. 376
  11. 400
  12. 560
  13. 568
  14. 236
  15. 200
  16. 96
  17. 600
  18. 424
  19. 584
  20. 360
  21. 440
  22. 296
  23. 228
  24. 432
  25. 168
  26. 424
  27. 284
  28. 88
  29. 176
  30. 96
  31. 256
  32. 496
  33. 304
  34. 612
  35. 136
  36. 208
  37. 604
  38. 516
  39. 216
  40. 448

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