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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 792 · 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. 1.56 × 8 =
  2. 2.21 × 8 =
  3. 3.118 × 4 =
  4. 4.67 × 4 =
  5. 5.24 × 4 =
  6. 6.113 × 4 =
  7. 7.26 × 8 =
  8. 8.129 × 4 =
  9. 9.28 × 8 =
  10. 10.57 × 8 =
  11. 11.146 × 4 =
  12. 12.59 × 8 =
  13. 13.85 × 4 =
  14. 14.135 × 4 =
  15. 15.100 × 4 =
  16. 16.65 × 4 =
  17. 17.13 × 4 =
  18. 18.124 × 4 =
  19. 19.17 × 8 =
  20. 20.157 × 4 =
  21. 21.145 × 4 =
  22. 22.43 × 8 =
  23. 23.55 × 8 =
  24. 24.131 × 4 =
  25. 25.13 × 4 =
  26. 26.69 × 8 =
  27. 27.132 × 4 =
  28. 28.76 × 4 =
  29. 29.52 × 4 =
  30. 30.120 × 4 =
  31. 31.127 × 4 =
  32. 32.149 × 4 =
  33. 33.131 × 4 =
  34. 34.23 × 8 =
  35. 35.30 × 4 =
  36. 36.159 × 4 =
  37. 37.23 × 4 =
  38. 38.67 × 8 =
  39. 39.40 × 8 =
  40. 40.31 × 8 =

Answer key

  1. 448
  2. 168
  3. 472
  4. 268
  5. 96
  6. 452
  7. 208
  8. 516
  9. 224
  10. 456
  11. 584
  12. 472
  13. 340
  14. 540
  15. 400
  16. 260
  17. 52
  18. 496
  19. 136
  20. 628
  21. 580
  22. 344
  23. 440
  24. 524
  25. 52
  26. 552
  27. 528
  28. 304
  29. 208
  30. 480
  31. 508
  32. 596
  33. 524
  34. 184
  35. 120
  36. 636
  37. 92
  38. 536
  39. 320
  40. 248

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