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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 476 · 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. 1.37 × 8 =
  2. 2.137 × 4 =
  3. 3.33 × 8 =
  4. 4.39 × 4 =
  5. 5.67 × 8 =
  6. 6.15 × 4 =
  7. 7.45 × 8 =
  8. 8.29 × 4 =
  9. 9.58 × 4 =
  10. 10.53 × 8 =
  11. 11.34 × 8 =
  12. 12.131 × 4 =
  13. 13.72 × 8 =
  14. 14.23 × 8 =
  15. 15.40 × 8 =
  16. 16.47 × 8 =
  17. 17.158 × 4 =
  18. 18.14 × 8 =
  19. 19.28 × 4 =
  20. 20.86 × 4 =
  21. 21.21 × 8 =
  22. 22.107 × 4 =
  23. 23.74 × 8 =
  24. 24.39 × 8 =
  25. 25.30 × 8 =
  26. 26.38 × 8 =
  27. 27.57 × 8 =
  28. 28.69 × 8 =
  29. 29.56 × 8 =
  30. 30.14 × 8 =
  31. 31.13 × 8 =
  32. 32.53 × 8 =
  33. 33.54 × 4 =
  34. 34.37 × 8 =
  35. 35.74 × 8 =
  36. 36.69 × 8 =
  37. 37.73 × 4 =
  38. 38.35 × 8 =
  39. 39.84 × 4 =
  40. 40.27 × 8 =

Answer key

  1. 296
  2. 548
  3. 264
  4. 156
  5. 536
  6. 60
  7. 360
  8. 116
  9. 232
  10. 424
  11. 272
  12. 524
  13. 576
  14. 184
  15. 320
  16. 376
  17. 632
  18. 112
  19. 112
  20. 344
  21. 168
  22. 428
  23. 592
  24. 312
  25. 240
  26. 304
  27. 456
  28. 552
  29. 448
  30. 112
  31. 104
  32. 424
  33. 216
  34. 296
  35. 592
  36. 552
  37. 292
  38. 280
  39. 336
  40. 216

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