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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 697 · 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. 1.62 × 4 =
  2. 2.16 × 8 =
  3. 3.126 × 4 =
  4. 4.113 × 4 =
  5. 5.45 × 4 =
  6. 6.153 × 4 =
  7. 7.68 × 8 =
  8. 8.104 × 4 =
  9. 9.14 × 8 =
  10. 10.34 × 8 =
  11. 11.19 × 8 =
  12. 12.16 × 4 =
  13. 13.66 × 4 =
  14. 14.95 × 4 =
  15. 15.115 × 4 =
  16. 16.145 × 4 =
  17. 17.69 × 8 =
  18. 18.147 × 4 =
  19. 19.15 × 8 =
  20. 20.16 × 8 =
  21. 21.36 × 8 =
  22. 22.43 × 8 =
  23. 23.104 × 4 =
  24. 24.138 × 4 =
  25. 25.62 × 4 =
  26. 26.16 × 8 =
  27. 27.120 × 4 =
  28. 28.54 × 8 =
  29. 29.87 × 4 =
  30. 30.70 × 4 =
  31. 31.114 × 4 =
  32. 32.46 × 4 =
  33. 33.155 × 4 =
  34. 34.88 × 4 =
  35. 35.32 × 8 =
  36. 36.87 × 4 =
  37. 37.20 × 4 =
  38. 38.68 × 8 =
  39. 39.76 × 4 =
  40. 40.41 × 8 =

Answer key

  1. 248
  2. 128
  3. 504
  4. 452
  5. 180
  6. 612
  7. 544
  8. 416
  9. 112
  10. 272
  11. 152
  12. 64
  13. 264
  14. 380
  15. 460
  16. 580
  17. 552
  18. 588
  19. 120
  20. 128
  21. 288
  22. 344
  23. 416
  24. 552
  25. 248
  26. 128
  27. 480
  28. 432
  29. 348
  30. 280
  31. 456
  32. 184
  33. 620
  34. 352
  35. 256
  36. 348
  37. 80
  38. 544
  39. 304
  40. 328

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