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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 92 · 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. 1.99 × 4 =
  2. 2.74 × 8 =
  3. 3.25 × 8 =
  4. 4.15 × 8 =
  5. 5.72 × 8 =
  6. 6.78 × 4 =
  7. 7.26 × 8 =
  8. 8.61 × 8 =
  9. 9.71 × 8 =
  10. 10.52 × 8 =
  11. 11.140 × 4 =
  12. 12.43 × 4 =
  13. 13.159 × 4 =
  14. 14.154 × 4 =
  15. 15.28 × 8 =
  16. 16.65 × 4 =
  17. 17.75 × 8 =
  18. 18.30 × 8 =
  19. 19.67 × 8 =
  20. 20.43 × 4 =
  21. 21.70 × 4 =
  22. 22.14 × 8 =
  23. 23.15 × 8 =
  24. 24.79 × 4 =
  25. 25.43 × 4 =
  26. 26.159 × 4 =
  27. 27.113 × 4 =
  28. 28.50 × 4 =
  29. 29.24 × 4 =
  30. 30.69 × 8 =
  31. 31.155 × 4 =
  32. 32.22 × 8 =
  33. 33.71 × 8 =
  34. 34.141 × 4 =
  35. 35.58 × 8 =
  36. 36.27 × 8 =
  37. 37.46 × 4 =
  38. 38.139 × 4 =
  39. 39.33 × 4 =
  40. 40.46 × 8 =

Answer key

  1. 396
  2. 592
  3. 200
  4. 120
  5. 576
  6. 312
  7. 208
  8. 488
  9. 568
  10. 416
  11. 560
  12. 172
  13. 636
  14. 616
  15. 224
  16. 260
  17. 600
  18. 240
  19. 536
  20. 172
  21. 280
  22. 112
  23. 120
  24. 316
  25. 172
  26. 636
  27. 452
  28. 200
  29. 96
  30. 552
  31. 620
  32. 176
  33. 568
  34. 564
  35. 464
  36. 216
  37. 184
  38. 556
  39. 132
  40. 368

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