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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 829 · 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 × 8 =
  2. 2.17 × 4 =
  3. 3.22 × 8 =
  4. 4.79 × 4 =
  5. 5.37 × 8 =
  6. 6.77 × 4 =
  7. 7.68 × 4 =
  8. 8.56 × 8 =
  9. 9.81 × 4 =
  10. 10.106 × 4 =
  11. 11.35 × 8 =
  12. 12.65 × 8 =
  13. 13.23 × 4 =
  14. 14.21 × 8 =
  15. 15.17 × 4 =
  16. 16.133 × 4 =
  17. 17.52 × 4 =
  18. 18.64 × 8 =
  19. 19.73 × 4 =
  20. 20.114 × 4 =
  21. 21.58 × 8 =
  22. 22.38 × 8 =
  23. 23.41 × 8 =
  24. 24.29 × 8 =
  25. 25.38 × 8 =
  26. 26.94 × 4 =
  27. 27.155 × 4 =
  28. 28.44 × 8 =
  29. 29.138 × 4 =
  30. 30.19 × 8 =
  31. 31.65 × 4 =
  32. 32.33 × 4 =
  33. 33.69 × 8 =
  34. 34.139 × 4 =
  35. 35.40 × 8 =
  36. 36.44 × 4 =
  37. 37.129 × 4 =
  38. 38.42 × 8 =
  39. 39.60 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 528
  2. 68
  3. 176
  4. 316
  5. 296
  6. 308
  7. 272
  8. 448
  9. 324
  10. 424
  11. 280
  12. 520
  13. 92
  14. 168
  15. 68
  16. 532
  17. 208
  18. 512
  19. 292
  20. 456
  21. 464
  22. 304
  23. 328
  24. 232
  25. 304
  26. 376
  27. 620
  28. 352
  29. 552
  30. 152
  31. 260
  32. 132
  33. 552
  34. 556
  35. 320
  36. 176
  37. 516
  38. 336
  39. 240
  40. 96

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