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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 772 · 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. 1.66 × 4 =
  2. 2.14 × 8 =
  3. 3.31 × 4 =
  4. 4.56 × 4 =
  5. 5.58 × 4 =
  6. 6.157 × 4 =
  7. 7.83 × 4 =
  8. 8.59 × 8 =
  9. 9.128 × 4 =
  10. 10.25 × 8 =
  11. 11.48 × 8 =
  12. 12.27 × 4 =
  13. 13.138 × 4 =
  14. 14.134 × 4 =
  15. 15.46 × 8 =
  16. 16.74 × 8 =
  17. 17.22 × 4 =
  18. 18.91 × 4 =
  19. 19.83 × 4 =
  20. 20.69 × 4 =
  21. 21.41 × 8 =
  22. 22.118 × 4 =
  23. 23.156 × 4 =
  24. 24.145 × 4 =
  25. 25.18 × 8 =
  26. 26.86 × 4 =
  27. 27.76 × 4 =
  28. 28.128 × 4 =
  29. 29.143 × 4 =
  30. 30.23 × 8 =
  31. 31.139 × 4 =
  32. 32.26 × 4 =
  33. 33.83 × 4 =
  34. 34.19 × 8 =
  35. 35.57 × 8 =
  36. 36.30 × 8 =
  37. 37.37 × 8 =
  38. 38.19 × 8 =
  39. 39.26 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 264
  2. 112
  3. 124
  4. 224
  5. 232
  6. 628
  7. 332
  8. 472
  9. 512
  10. 200
  11. 384
  12. 108
  13. 552
  14. 536
  15. 368
  16. 592
  17. 88
  18. 364
  19. 332
  20. 276
  21. 328
  22. 472
  23. 624
  24. 580
  25. 144
  26. 344
  27. 304
  28. 512
  29. 572
  30. 184
  31. 556
  32. 104
  33. 332
  34. 152
  35. 456
  36. 240
  37. 296
  38. 152
  39. 208
  40. 160

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