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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 65 · 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. 1.30 × 8 =
  2. 2.36 × 4 =
  3. 3.53 × 8 =
  4. 4.103 × 4 =
  5. 5.146 × 4 =
  6. 6.62 × 4 =
  7. 7.118 × 4 =
  8. 8.19 × 4 =
  9. 9.60 × 4 =
  10. 10.45 × 4 =
  11. 11.41 × 4 =
  12. 12.52 × 8 =
  13. 13.31 × 8 =
  14. 14.50 × 8 =
  15. 15.31 × 4 =
  16. 16.40 × 4 =
  17. 17.44 × 8 =
  18. 18.17 × 8 =
  19. 19.116 × 4 =
  20. 20.29 × 4 =
  21. 21.53 × 8 =
  22. 22.61 × 4 =
  23. 23.81 × 4 =
  24. 24.25 × 8 =
  25. 25.49 × 8 =
  26. 26.22 × 8 =
  27. 27.125 × 4 =
  28. 28.44 × 8 =
  29. 29.119 × 4 =
  30. 30.46 × 4 =
  31. 31.13 × 8 =
  32. 32.97 × 4 =
  33. 33.134 × 4 =
  34. 34.13 × 4 =
  35. 35.130 × 4 =
  36. 36.71 × 8 =
  37. 37.19 × 8 =
  38. 38.56 × 4 =
  39. 39.37 × 4 =
  40. 40.105 × 4 =

Answer key

  1. 240
  2. 144
  3. 424
  4. 412
  5. 584
  6. 248
  7. 472
  8. 76
  9. 240
  10. 180
  11. 164
  12. 416
  13. 248
  14. 400
  15. 124
  16. 160
  17. 352
  18. 136
  19. 464
  20. 116
  21. 424
  22. 244
  23. 324
  24. 200
  25. 392
  26. 176
  27. 500
  28. 352
  29. 476
  30. 184
  31. 104
  32. 388
  33. 536
  34. 52
  35. 520
  36. 568
  37. 152
  38. 224
  39. 148
  40. 420

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