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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 682 · 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. 1.27 × 8 =
  2. 2.55 × 8 =
  3. 3.69 × 8 =
  4. 4.103 × 4 =
  5. 5.89 × 4 =
  6. 6.30 × 8 =
  7. 7.75 × 4 =
  8. 8.148 × 4 =
  9. 9.97 × 4 =
  10. 10.145 × 4 =
  11. 11.39 × 4 =
  12. 12.13 × 8 =
  13. 13.65 × 4 =
  14. 14.75 × 8 =
  15. 15.56 × 4 =
  16. 16.50 × 8 =
  17. 17.73 × 8 =
  18. 18.56 × 4 =
  19. 19.71 × 8 =
  20. 20.45 × 8 =
  21. 21.17 × 8 =
  22. 22.23 × 8 =
  23. 23.67 × 4 =
  24. 24.64 × 8 =
  25. 25.59 × 8 =
  26. 26.21 × 4 =
  27. 27.54 × 8 =
  28. 28.54 × 8 =
  29. 29.14 × 4 =
  30. 30.34 × 8 =
  31. 31.87 × 4 =
  32. 32.13 × 8 =
  33. 33.109 × 4 =
  34. 34.29 × 8 =
  35. 35.85 × 4 =
  36. 36.44 × 4 =
  37. 37.51 × 4 =
  38. 38.27 × 8 =
  39. 39.41 × 8 =
  40. 40.91 × 4 =

Answer key

  1. 216
  2. 440
  3. 552
  4. 412
  5. 356
  6. 240
  7. 300
  8. 592
  9. 388
  10. 580
  11. 156
  12. 104
  13. 260
  14. 600
  15. 224
  16. 400
  17. 584
  18. 224
  19. 568
  20. 360
  21. 136
  22. 184
  23. 268
  24. 512
  25. 472
  26. 84
  27. 432
  28. 432
  29. 56
  30. 272
  31. 348
  32. 104
  33. 436
  34. 232
  35. 340
  36. 176
  37. 204
  38. 216
  39. 328
  40. 364

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