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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 301 · 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. 1.41 × 8 =
  2. 2.23 × 8 =
  3. 3.40 × 4 =
  4. 4.50 × 4 =
  5. 5.43 × 8 =
  6. 6.92 × 4 =
  7. 7.48 × 8 =
  8. 8.29 × 8 =
  9. 9.115 × 4 =
  10. 10.21 × 8 =
  11. 11.46 × 8 =
  12. 12.139 × 4 =
  13. 13.69 × 8 =
  14. 14.87 × 4 =
  15. 15.143 × 4 =
  16. 16.20 × 4 =
  17. 17.44 × 8 =
  18. 18.19 × 8 =
  19. 19.63 × 4 =
  20. 20.37 × 4 =
  21. 21.51 × 8 =
  22. 22.37 × 4 =
  23. 23.22 × 4 =
  24. 24.31 × 4 =
  25. 25.159 × 4 =
  26. 26.30 × 8 =
  27. 27.50 × 4 =
  28. 28.55 × 8 =
  29. 29.64 × 4 =
  30. 30.107 × 4 =
  31. 31.15 × 8 =
  32. 32.160 × 4 =
  33. 33.71 × 8 =
  34. 34.138 × 4 =
  35. 35.134 × 4 =
  36. 36.18 × 8 =
  37. 37.48 × 8 =
  38. 38.39 × 8 =
  39. 39.64 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 328
  2. 184
  3. 160
  4. 200
  5. 344
  6. 368
  7. 384
  8. 232
  9. 460
  10. 168
  11. 368
  12. 556
  13. 552
  14. 348
  15. 572
  16. 80
  17. 352
  18. 152
  19. 252
  20. 148
  21. 408
  22. 148
  23. 88
  24. 124
  25. 636
  26. 240
  27. 200
  28. 440
  29. 256
  30. 428
  31. 120
  32. 640
  33. 568
  34. 552
  35. 536
  36. 144
  37. 384
  38. 312
  39. 256
  40. 232

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