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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 30 · 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. 1.89 × 4 =
  2. 2.153 × 4 =
  3. 3.29 × 8 =
  4. 4.62 × 8 =
  5. 5.39 × 4 =
  6. 6.59 × 8 =
  7. 7.59 × 4 =
  8. 8.63 × 8 =
  9. 9.33 × 8 =
  10. 10.39 × 4 =
  11. 11.24 × 8 =
  12. 12.35 × 4 =
  13. 13.43 × 4 =
  14. 14.23 × 4 =
  15. 15.60 × 8 =
  16. 16.75 × 8 =
  17. 17.18 × 4 =
  18. 18.76 × 4 =
  19. 19.50 × 8 =
  20. 20.33 × 8 =
  21. 21.88 × 4 =
  22. 22.37 × 4 =
  23. 23.55 × 8 =
  24. 24.50 × 4 =
  25. 25.33 × 4 =
  26. 26.50 × 8 =
  27. 27.13 × 8 =
  28. 28.59 × 8 =
  29. 29.18 × 8 =
  30. 30.16 × 8 =
  31. 31.18 × 4 =
  32. 32.107 × 4 =
  33. 33.57 × 8 =
  34. 34.33 × 8 =
  35. 35.59 × 8 =
  36. 36.71 × 4 =
  37. 37.48 × 8 =
  38. 38.69 × 8 =
  39. 39.113 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 356
  2. 612
  3. 232
  4. 496
  5. 156
  6. 472
  7. 236
  8. 504
  9. 264
  10. 156
  11. 192
  12. 140
  13. 172
  14. 92
  15. 480
  16. 600
  17. 72
  18. 304
  19. 400
  20. 264
  21. 352
  22. 148
  23. 440
  24. 200
  25. 132
  26. 400
  27. 104
  28. 472
  29. 144
  30. 128
  31. 72
  32. 428
  33. 456
  34. 264
  35. 472
  36. 284
  37. 384
  38. 552
  39. 452
  40. 176

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