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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 253 · 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. 1.140 × 4 =
  2. 2.25 × 8 =
  3. 3.62 × 8 =
  4. 4.59 × 8 =
  5. 5.30 × 4 =
  6. 6.79 × 4 =
  7. 7.26 × 8 =
  8. 8.44 × 8 =
  9. 9.134 × 4 =
  10. 10.31 × 8 =
  11. 11.44 × 4 =
  12. 12.16 × 8 =
  13. 13.61 × 4 =
  14. 14.23 × 8 =
  15. 15.89 × 4 =
  16. 16.17 × 8 =
  17. 17.94 × 4 =
  18. 18.34 × 4 =
  19. 19.29 × 8 =
  20. 20.53 × 8 =
  21. 21.58 × 4 =
  22. 22.13 × 8 =
  23. 23.46 × 8 =
  24. 24.57 × 8 =
  25. 25.48 × 8 =
  26. 26.153 × 4 =
  27. 27.33 × 8 =
  28. 28.56 × 4 =
  29. 29.26 × 8 =
  30. 30.53 × 4 =
  31. 31.130 × 4 =
  32. 32.30 × 8 =
  33. 33.116 × 4 =
  34. 34.40 × 8 =
  35. 35.37 × 8 =
  36. 36.37 × 8 =
  37. 37.44 × 4 =
  38. 38.111 × 4 =
  39. 39.66 × 8 =
  40. 40.134 × 4 =

Answer key

  1. 560
  2. 200
  3. 496
  4. 472
  5. 120
  6. 316
  7. 208
  8. 352
  9. 536
  10. 248
  11. 176
  12. 128
  13. 244
  14. 184
  15. 356
  16. 136
  17. 376
  18. 136
  19. 232
  20. 424
  21. 232
  22. 104
  23. 368
  24. 456
  25. 384
  26. 612
  27. 264
  28. 224
  29. 208
  30. 212
  31. 520
  32. 240
  33. 464
  34. 320
  35. 296
  36. 296
  37. 176
  38. 444
  39. 528
  40. 536

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