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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 730 · 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. 1.53 × 4 =
  2. 2.47 × 8 =
  3. 3.41 × 8 =
  4. 4.13 × 8 =
  5. 5.139 × 4 =
  6. 6.146 × 4 =
  7. 7.66 × 4 =
  8. 8.21 × 8 =
  9. 9.58 × 8 =
  10. 10.147 × 4 =
  11. 11.69 × 8 =
  12. 12.71 × 8 =
  13. 13.116 × 4 =
  14. 14.92 × 4 =
  15. 15.145 × 4 =
  16. 16.46 × 8 =
  17. 17.20 × 8 =
  18. 18.26 × 8 =
  19. 19.159 × 4 =
  20. 20.70 × 8 =
  21. 21.13 × 8 =
  22. 22.70 × 4 =
  23. 23.25 × 8 =
  24. 24.84 × 4 =
  25. 25.27 × 8 =
  26. 26.97 × 4 =
  27. 27.17 × 8 =
  28. 28.23 × 8 =
  29. 29.137 × 4 =
  30. 30.54 × 8 =
  31. 31.58 × 4 =
  32. 32.74 × 8 =
  33. 33.67 × 8 =
  34. 34.38 × 4 =
  35. 35.34 × 4 =
  36. 36.53 × 8 =
  37. 37.28 × 8 =
  38. 38.58 × 8 =
  39. 39.57 × 4 =
  40. 40.22 × 4 =

Answer key

  1. 212
  2. 376
  3. 328
  4. 104
  5. 556
  6. 584
  7. 264
  8. 168
  9. 464
  10. 588
  11. 552
  12. 568
  13. 464
  14. 368
  15. 580
  16. 368
  17. 160
  18. 208
  19. 636
  20. 560
  21. 104
  22. 280
  23. 200
  24. 336
  25. 216
  26. 388
  27. 136
  28. 184
  29. 548
  30. 432
  31. 232
  32. 592
  33. 536
  34. 152
  35. 136
  36. 424
  37. 224
  38. 464
  39. 228
  40. 88

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