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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 559 · 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. 1.54 × 4 =
  2. 2.44 × 8 =
  3. 3.60 × 4 =
  4. 4.43 × 8 =
  5. 5.18 × 8 =
  6. 6.21 × 8 =
  7. 7.23 × 8 =
  8. 8.16 × 8 =
  9. 9.71 × 8 =
  10. 10.61 × 8 =
  11. 11.34 × 8 =
  12. 12.52 × 4 =
  13. 13.13 × 4 =
  14. 14.68 × 8 =
  15. 15.129 × 4 =
  16. 16.142 × 4 =
  17. 17.153 × 4 =
  18. 18.45 × 8 =
  19. 19.38 × 8 =
  20. 20.60 × 4 =
  21. 21.92 × 4 =
  22. 22.62 × 8 =
  23. 23.57 × 8 =
  24. 24.23 × 8 =
  25. 25.155 × 4 =
  26. 26.54 × 8 =
  27. 27.101 × 4 =
  28. 28.24 × 8 =
  29. 29.66 × 4 =
  30. 30.134 × 4 =
  31. 31.41 × 4 =
  32. 32.23 × 8 =
  33. 33.67 × 8 =
  34. 34.73 × 4 =
  35. 35.132 × 4 =
  36. 36.29 × 4 =
  37. 37.75 × 4 =
  38. 38.50 × 8 =
  39. 39.146 × 4 =
  40. 40.132 × 4 =

Answer key

  1. 216
  2. 352
  3. 240
  4. 344
  5. 144
  6. 168
  7. 184
  8. 128
  9. 568
  10. 488
  11. 272
  12. 208
  13. 52
  14. 544
  15. 516
  16. 568
  17. 612
  18. 360
  19. 304
  20. 240
  21. 368
  22. 496
  23. 456
  24. 184
  25. 620
  26. 432
  27. 404
  28. 192
  29. 264
  30. 536
  31. 164
  32. 184
  33. 536
  34. 292
  35. 528
  36. 116
  37. 300
  38. 400
  39. 584
  40. 528

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