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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 638 · 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. 1.142 × 4 =
  2. 2.104 × 4 =
  3. 3.20 × 8 =
  4. 4.68 × 8 =
  5. 5.126 × 4 =
  6. 6.47 × 8 =
  7. 7.33 × 4 =
  8. 8.145 × 4 =
  9. 9.24 × 8 =
  10. 10.62 × 8 =
  11. 11.38 × 8 =
  12. 12.108 × 4 =
  13. 13.24 × 4 =
  14. 14.15 × 8 =
  15. 15.67 × 8 =
  16. 16.28 × 8 =
  17. 17.72 × 8 =
  18. 18.29 × 4 =
  19. 19.59 × 8 =
  20. 20.15 × 4 =
  21. 21.20 × 8 =
  22. 22.122 × 4 =
  23. 23.28 × 4 =
  24. 24.114 × 4 =
  25. 25.24 × 4 =
  26. 26.14 × 8 =
  27. 27.45 × 4 =
  28. 28.158 × 4 =
  29. 29.52 × 8 =
  30. 30.48 × 8 =
  31. 31.137 × 4 =
  32. 32.32 × 8 =
  33. 33.116 × 4 =
  34. 34.15 × 4 =
  35. 35.68 × 8 =
  36. 36.22 × 8 =
  37. 37.146 × 4 =
  38. 38.29 × 8 =
  39. 39.79 × 4 =
  40. 40.64 × 8 =

Answer key

  1. 568
  2. 416
  3. 160
  4. 544
  5. 504
  6. 376
  7. 132
  8. 580
  9. 192
  10. 496
  11. 304
  12. 432
  13. 96
  14. 120
  15. 536
  16. 224
  17. 576
  18. 116
  19. 472
  20. 60
  21. 160
  22. 488
  23. 112
  24. 456
  25. 96
  26. 112
  27. 180
  28. 632
  29. 416
  30. 384
  31. 548
  32. 256
  33. 464
  34. 60
  35. 544
  36. 176
  37. 584
  38. 232
  39. 316
  40. 512

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