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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 321 · 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. 1.26 × 4 =
  2. 2.69 × 8 =
  3. 3.146 × 4 =
  4. 4.15 × 4 =
  5. 5.72 × 8 =
  6. 6.114 × 4 =
  7. 7.75 × 4 =
  8. 8.45 × 4 =
  9. 9.126 × 4 =
  10. 10.32 × 8 =
  11. 11.21 × 8 =
  12. 12.122 × 4 =
  13. 13.123 × 4 =
  14. 14.87 × 4 =
  15. 15.80 × 4 =
  16. 16.85 × 4 =
  17. 17.64 × 8 =
  18. 18.23 × 8 =
  19. 19.61 × 8 =
  20. 20.82 × 4 =
  21. 21.149 × 4 =
  22. 22.158 × 4 =
  23. 23.131 × 4 =
  24. 24.159 × 4 =
  25. 25.16 × 8 =
  26. 26.87 × 4 =
  27. 27.138 × 4 =
  28. 28.22 × 8 =
  29. 29.20 × 8 =
  30. 30.75 × 8 =
  31. 31.47 × 4 =
  32. 32.87 × 4 =
  33. 33.29 × 8 =
  34. 34.20 × 4 =
  35. 35.94 × 4 =
  36. 36.33 × 4 =
  37. 37.59 × 4 =
  38. 38.110 × 4 =
  39. 39.26 × 8 =
  40. 40.26 × 4 =

Answer key

  1. 104
  2. 552
  3. 584
  4. 60
  5. 576
  6. 456
  7. 300
  8. 180
  9. 504
  10. 256
  11. 168
  12. 488
  13. 492
  14. 348
  15. 320
  16. 340
  17. 512
  18. 184
  19. 488
  20. 328
  21. 596
  22. 632
  23. 524
  24. 636
  25. 128
  26. 348
  27. 552
  28. 176
  29. 160
  30. 600
  31. 188
  32. 348
  33. 232
  34. 80
  35. 376
  36. 132
  37. 236
  38. 440
  39. 208
  40. 104

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