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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 98 · 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. 1.33 × 8 =
  2. 2.122 × 4 =
  3. 3.41 × 4 =
  4. 4.54 × 8 =
  5. 5.14 × 8 =
  6. 6.106 × 4 =
  7. 7.68 × 4 =
  8. 8.63 × 4 =
  9. 9.32 × 4 =
  10. 10.63 × 8 =
  11. 11.57 × 4 =
  12. 12.134 × 4 =
  13. 13.67 × 8 =
  14. 14.21 × 8 =
  15. 15.90 × 4 =
  16. 16.56 × 8 =
  17. 17.57 × 8 =
  18. 18.31 × 8 =
  19. 19.27 × 8 =
  20. 20.33 × 4 =
  21. 21.88 × 4 =
  22. 22.17 × 8 =
  23. 23.44 × 4 =
  24. 24.53 × 4 =
  25. 25.51 × 4 =
  26. 26.38 × 8 =
  27. 27.156 × 4 =
  28. 28.67 × 4 =
  29. 29.67 × 8 =
  30. 30.73 × 8 =
  31. 31.24 × 8 =
  32. 32.26 × 4 =
  33. 33.23 × 4 =
  34. 34.67 × 8 =
  35. 35.89 × 4 =
  36. 36.38 × 8 =
  37. 37.63 × 8 =
  38. 38.26 × 4 =
  39. 39.53 × 4 =
  40. 40.127 × 4 =

Answer key

  1. 264
  2. 488
  3. 164
  4. 432
  5. 112
  6. 424
  7. 272
  8. 252
  9. 128
  10. 504
  11. 228
  12. 536
  13. 536
  14. 168
  15. 360
  16. 448
  17. 456
  18. 248
  19. 216
  20. 132
  21. 352
  22. 136
  23. 176
  24. 212
  25. 204
  26. 304
  27. 624
  28. 268
  29. 536
  30. 584
  31. 192
  32. 104
  33. 92
  34. 536
  35. 356
  36. 304
  37. 504
  38. 104
  39. 212
  40. 508

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