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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 452 · 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. 1.33 × 8 =
  2. 2.53 × 8 =
  3. 3.99 × 4 =
  4. 4.58 × 8 =
  5. 5.63 × 8 =
  6. 6.147 × 4 =
  7. 7.32 × 8 =
  8. 8.19 × 8 =
  9. 9.76 × 4 =
  10. 10.32 × 8 =
  11. 11.42 × 4 =
  12. 12.47 × 8 =
  13. 13.22 × 8 =
  14. 14.62 × 8 =
  15. 15.23 × 4 =
  16. 16.127 × 4 =
  17. 17.92 × 4 =
  18. 18.16 × 8 =
  19. 19.153 × 4 =
  20. 20.155 × 4 =
  21. 21.20 × 8 =
  22. 22.75 × 8 =
  23. 23.74 × 8 =
  24. 24.15 × 8 =
  25. 25.156 × 4 =
  26. 26.45 × 4 =
  27. 27.18 × 4 =
  28. 28.23 × 4 =
  29. 29.35 × 4 =
  30. 30.72 × 8 =
  31. 31.36 × 4 =
  32. 32.51 × 8 =
  33. 33.16 × 4 =
  34. 34.29 × 4 =
  35. 35.31 × 4 =
  36. 36.25 × 8 =
  37. 37.143 × 4 =
  38. 38.150 × 4 =
  39. 39.45 × 8 =
  40. 40.27 × 8 =

Answer key

  1. 264
  2. 424
  3. 396
  4. 464
  5. 504
  6. 588
  7. 256
  8. 152
  9. 304
  10. 256
  11. 168
  12. 376
  13. 176
  14. 496
  15. 92
  16. 508
  17. 368
  18. 128
  19. 612
  20. 620
  21. 160
  22. 600
  23. 592
  24. 120
  25. 624
  26. 180
  27. 72
  28. 92
  29. 140
  30. 576
  31. 144
  32. 408
  33. 64
  34. 116
  35. 124
  36. 200
  37. 572
  38. 600
  39. 360
  40. 216

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