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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 840 · 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. 2.158 × 4 =
  3. 3.134 × 4 =
  4. 4.47 × 8 =
  5. 5.25 × 4 =
  6. 6.100 × 4 =
  7. 7.26 × 4 =
  8. 8.137 × 4 =
  9. 9.107 × 4 =
  10. 10.22 × 8 =
  11. 11.51 × 8 =
  12. 12.102 × 4 =
  13. 13.23 × 8 =
  14. 14.65 × 8 =
  15. 15.51 × 8 =
  16. 16.52 × 4 =
  17. 17.15 × 4 =
  18. 18.45 × 8 =
  19. 19.78 × 4 =
  20. 20.24 × 8 =
  21. 21.47 × 8 =
  22. 22.150 × 4 =
  23. 23.28 × 4 =
  24. 24.73 × 4 =
  25. 25.46 × 8 =
  26. 26.23 × 8 =
  27. 27.61 × 4 =
  28. 28.50 × 8 =
  29. 29.12 × 8 =
  30. 30.39 × 8 =
  31. 31.94 × 4 =
  32. 32.19 × 8 =
  33. 33.139 × 4 =
  34. 34.49 × 4 =
  35. 35.63 × 8 =
  36. 36.39 × 4 =
  37. 37.85 × 4 =
  38. 38.74 × 8 =
  39. 39.40 × 4 =
  40. 40.45 × 8 =

Answer key

  1. 296
  2. 632
  3. 536
  4. 376
  5. 100
  6. 400
  7. 104
  8. 548
  9. 428
  10. 176
  11. 408
  12. 408
  13. 184
  14. 520
  15. 408
  16. 208
  17. 60
  18. 360
  19. 312
  20. 192
  21. 376
  22. 600
  23. 112
  24. 292
  25. 368
  26. 184
  27. 244
  28. 400
  29. 96
  30. 312
  31. 376
  32. 152
  33. 556
  34. 196
  35. 504
  36. 156
  37. 340
  38. 592
  39. 160
  40. 360

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