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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 629 · 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. 1.104 × 4 =
  2. 2.93 × 4 =
  3. 3.159 × 4 =
  4. 4.28 × 8 =
  5. 5.58 × 4 =
  6. 6.47 × 8 =
  7. 7.14 × 8 =
  8. 8.20 × 8 =
  9. 9.115 × 4 =
  10. 10.152 × 4 =
  11. 11.52 × 8 =
  12. 12.95 × 4 =
  13. 13.17 × 4 =
  14. 14.57 × 4 =
  15. 15.61 × 8 =
  16. 16.19 × 8 =
  17. 17.70 × 8 =
  18. 18.42 × 8 =
  19. 19.49 × 8 =
  20. 20.42 × 8 =
  21. 21.153 × 4 =
  22. 22.47 × 4 =
  23. 23.52 × 8 =
  24. 24.157 × 4 =
  25. 25.34 × 4 =
  26. 26.56 × 8 =
  27. 27.21 × 8 =
  28. 28.62 × 8 =
  29. 29.142 × 4 =
  30. 30.67 × 8 =
  31. 31.61 × 4 =
  32. 32.69 × 4 =
  33. 33.37 × 4 =
  34. 34.19 × 8 =
  35. 35.157 × 4 =
  36. 36.50 × 4 =
  37. 37.30 × 4 =
  38. 38.83 × 4 =
  39. 39.29 × 8 =
  40. 40.113 × 4 =

Answer key

  1. 416
  2. 372
  3. 636
  4. 224
  5. 232
  6. 376
  7. 112
  8. 160
  9. 460
  10. 608
  11. 416
  12. 380
  13. 68
  14. 228
  15. 488
  16. 152
  17. 560
  18. 336
  19. 392
  20. 336
  21. 612
  22. 188
  23. 416
  24. 628
  25. 136
  26. 448
  27. 168
  28. 496
  29. 568
  30. 536
  31. 244
  32. 276
  33. 148
  34. 152
  35. 628
  36. 200
  37. 120
  38. 332
  39. 232
  40. 452

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