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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 132 · 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 × 4 =
  2. 2.37 × 8 =
  3. 3.145 × 4 =
  4. 4.27 × 8 =
  5. 5.136 × 4 =
  6. 6.12 × 8 =
  7. 7.45 × 4 =
  8. 8.31 × 4 =
  9. 9.158 × 4 =
  10. 10.58 × 8 =
  11. 11.144 × 4 =
  12. 12.72 × 8 =
  13. 13.15 × 8 =
  14. 14.13 × 8 =
  15. 15.144 × 4 =
  16. 16.70 × 4 =
  17. 17.58 × 8 =
  18. 18.68 × 8 =
  19. 19.148 × 4 =
  20. 20.53 × 8 =
  21. 21.156 × 4 =
  22. 22.135 × 4 =
  23. 23.34 × 8 =
  24. 24.124 × 4 =
  25. 25.54 × 8 =
  26. 26.155 × 4 =
  27. 27.101 × 4 =
  28. 28.18 × 4 =
  29. 29.17 × 8 =
  30. 30.25 × 8 =
  31. 31.66 × 4 =
  32. 32.24 × 4 =
  33. 33.31 × 4 =
  34. 34.25 × 8 =
  35. 35.51 × 4 =
  36. 36.66 × 4 =
  37. 37.72 × 4 =
  38. 38.143 × 4 =
  39. 39.145 × 4 =
  40. 40.32 × 4 =

Answer key

  1. 244
  2. 296
  3. 580
  4. 216
  5. 544
  6. 96
  7. 180
  8. 124
  9. 632
  10. 464
  11. 576
  12. 576
  13. 120
  14. 104
  15. 576
  16. 280
  17. 464
  18. 544
  19. 592
  20. 424
  21. 624
  22. 540
  23. 272
  24. 496
  25. 432
  26. 620
  27. 404
  28. 72
  29. 136
  30. 200
  31. 264
  32. 96
  33. 124
  34. 200
  35. 204
  36. 264
  37. 288
  38. 572
  39. 580
  40. 128

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