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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 351 · 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. 1.69 × 4 =
  2. 2.26 × 8 =
  3. 3.22 × 4 =
  4. 4.135 × 4 =
  5. 5.114 × 4 =
  6. 6.69 × 8 =
  7. 7.25 × 8 =
  8. 8.63 × 4 =
  9. 9.21 × 8 =
  10. 10.14 × 8 =
  11. 11.158 × 4 =
  12. 12.73 × 8 =
  13. 13.109 × 4 =
  14. 14.14 × 8 =
  15. 15.64 × 8 =
  16. 16.26 × 4 =
  17. 17.35 × 8 =
  18. 18.80 × 4 =
  19. 19.74 × 8 =
  20. 20.94 × 4 =
  21. 21.17 × 4 =
  22. 22.156 × 4 =
  23. 23.24 × 8 =
  24. 24.15 × 8 =
  25. 25.43 × 4 =
  26. 26.115 × 4 =
  27. 27.49 × 4 =
  28. 28.53 × 8 =
  29. 29.59 × 4 =
  30. 30.70 × 4 =
  31. 31.67 × 4 =
  32. 32.73 × 8 =
  33. 33.68 × 8 =
  34. 34.34 × 4 =
  35. 35.110 × 4 =
  36. 36.127 × 4 =
  37. 37.86 × 4 =
  38. 38.14 × 4 =
  39. 39.151 × 4 =
  40. 40.57 × 8 =

Answer key

  1. 276
  2. 208
  3. 88
  4. 540
  5. 456
  6. 552
  7. 200
  8. 252
  9. 168
  10. 112
  11. 632
  12. 584
  13. 436
  14. 112
  15. 512
  16. 104
  17. 280
  18. 320
  19. 592
  20. 376
  21. 68
  22. 624
  23. 192
  24. 120
  25. 172
  26. 460
  27. 196
  28. 424
  29. 236
  30. 280
  31. 268
  32. 584
  33. 544
  34. 136
  35. 440
  36. 508
  37. 344
  38. 56
  39. 604
  40. 456

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