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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 782 · 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. 1.50 × 8 =
  2. 2.66 × 8 =
  3. 3.40 × 4 =
  4. 4.73 × 8 =
  5. 5.107 × 4 =
  6. 6.144 × 4 =
  7. 7.147 × 4 =
  8. 8.52 × 8 =
  9. 9.129 × 4 =
  10. 10.152 × 4 =
  11. 11.57 × 8 =
  12. 12.68 × 8 =
  13. 13.19 × 4 =
  14. 14.33 × 8 =
  15. 15.21 × 8 =
  16. 16.23 × 8 =
  17. 17.150 × 4 =
  18. 18.129 × 4 =
  19. 19.36 × 4 =
  20. 20.83 × 4 =
  21. 21.149 × 4 =
  22. 22.14 × 4 =
  23. 23.141 × 4 =
  24. 24.42 × 8 =
  25. 25.42 × 4 =
  26. 26.62 × 8 =
  27. 27.103 × 4 =
  28. 28.119 × 4 =
  29. 29.12 × 8 =
  30. 30.87 × 4 =
  31. 31.37 × 4 =
  32. 32.114 × 4 =
  33. 33.76 × 4 =
  34. 34.91 × 4 =
  35. 35.42 × 8 =
  36. 36.50 × 8 =
  37. 37.23 × 8 =
  38. 38.47 × 4 =
  39. 39.53 × 4 =
  40. 40.16 × 8 =

Answer key

  1. 400
  2. 528
  3. 160
  4. 584
  5. 428
  6. 576
  7. 588
  8. 416
  9. 516
  10. 608
  11. 456
  12. 544
  13. 76
  14. 264
  15. 168
  16. 184
  17. 600
  18. 516
  19. 144
  20. 332
  21. 596
  22. 56
  23. 564
  24. 336
  25. 168
  26. 496
  27. 412
  28. 476
  29. 96
  30. 348
  31. 148
  32. 456
  33. 304
  34. 364
  35. 336
  36. 400
  37. 184
  38. 188
  39. 212
  40. 128

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