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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 450 · 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. 1.61 × 8 =
  2. 2.45 × 8 =
  3. 3.25 × 8 =
  4. 4.102 × 4 =
  5. 5.56 × 4 =
  6. 6.14 × 4 =
  7. 7.140 × 4 =
  8. 8.21 × 4 =
  9. 9.141 × 4 =
  10. 10.51 × 8 =
  11. 11.26 × 8 =
  12. 12.14 × 4 =
  13. 13.31 × 8 =
  14. 14.20 × 8 =
  15. 15.31 × 8 =
  16. 16.143 × 4 =
  17. 17.109 × 4 =
  18. 18.52 × 8 =
  19. 19.111 × 4 =
  20. 20.69 × 8 =
  21. 21.21 × 4 =
  22. 22.14 × 8 =
  23. 23.25 × 8 =
  24. 24.45 × 4 =
  25. 25.88 × 4 =
  26. 26.42 × 8 =
  27. 27.31 × 8 =
  28. 28.81 × 4 =
  29. 29.59 × 4 =
  30. 30.28 × 8 =
  31. 31.57 × 8 =
  32. 32.109 × 4 =
  33. 33.150 × 4 =
  34. 34.67 × 4 =
  35. 35.138 × 4 =
  36. 36.56 × 8 =
  37. 37.48 × 8 =
  38. 38.74 × 4 =
  39. 39.145 × 4 =
  40. 40.18 × 8 =

Answer key

  1. 488
  2. 360
  3. 200
  4. 408
  5. 224
  6. 56
  7. 560
  8. 84
  9. 564
  10. 408
  11. 208
  12. 56
  13. 248
  14. 160
  15. 248
  16. 572
  17. 436
  18. 416
  19. 444
  20. 552
  21. 84
  22. 112
  23. 200
  24. 180
  25. 352
  26. 336
  27. 248
  28. 324
  29. 236
  30. 224
  31. 456
  32. 436
  33. 600
  34. 268
  35. 552
  36. 448
  37. 384
  38. 296
  39. 580
  40. 144

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