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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 760 · 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. 1.21 × 4 =
  2. 2.43 × 4 =
  3. 3.69 × 8 =
  4. 4.18 × 4 =
  5. 5.65 × 4 =
  6. 6.19 × 8 =
  7. 7.156 × 4 =
  8. 8.12 × 8 =
  9. 9.14 × 4 =
  10. 10.45 × 4 =
  11. 11.125 × 4 =
  12. 12.17 × 8 =
  13. 13.62 × 8 =
  14. 14.26 × 4 =
  15. 15.50 × 4 =
  16. 16.29 × 8 =
  17. 17.18 × 8 =
  18. 18.16 × 8 =
  19. 19.154 × 4 =
  20. 20.54 × 4 =
  21. 21.137 × 4 =
  22. 22.13 × 8 =
  23. 23.31 × 8 =
  24. 24.13 × 8 =
  25. 25.113 × 4 =
  26. 26.32 × 4 =
  27. 27.40 × 4 =
  28. 28.19 × 8 =
  29. 29.21 × 8 =
  30. 30.72 × 4 =
  31. 31.49 × 8 =
  32. 32.22 × 4 =
  33. 33.149 × 4 =
  34. 34.70 × 4 =
  35. 35.34 × 4 =
  36. 36.66 × 8 =
  37. 37.88 × 4 =
  38. 38.108 × 4 =
  39. 39.24 × 4 =
  40. 40.148 × 4 =

Answer key

  1. 84
  2. 172
  3. 552
  4. 72
  5. 260
  6. 152
  7. 624
  8. 96
  9. 56
  10. 180
  11. 500
  12. 136
  13. 496
  14. 104
  15. 200
  16. 232
  17. 144
  18. 128
  19. 616
  20. 216
  21. 548
  22. 104
  23. 248
  24. 104
  25. 452
  26. 128
  27. 160
  28. 152
  29. 168
  30. 288
  31. 392
  32. 88
  33. 596
  34. 280
  35. 136
  36. 528
  37. 352
  38. 432
  39. 96
  40. 592

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