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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 440 · 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. 1.41 × 8 =
  2. 2.21 × 8 =
  3. 3.41 × 8 =
  4. 4.24 × 8 =
  5. 5.31 × 8 =
  6. 6.145 × 4 =
  7. 7.103 × 4 =
  8. 8.112 × 4 =
  9. 9.124 × 4 =
  10. 10.42 × 4 =
  11. 11.48 × 4 =
  12. 12.51 × 4 =
  13. 13.21 × 8 =
  14. 14.17 × 8 =
  15. 15.129 × 4 =
  16. 16.14 × 4 =
  17. 17.151 × 4 =
  18. 18.125 × 4 =
  19. 19.47 × 4 =
  20. 20.73 × 8 =
  21. 21.148 × 4 =
  22. 22.72 × 4 =
  23. 23.144 × 4 =
  24. 24.113 × 4 =
  25. 25.40 × 8 =
  26. 26.42 × 8 =
  27. 27.17 × 8 =
  28. 28.54 × 8 =
  29. 29.16 × 4 =
  30. 30.151 × 4 =
  31. 31.43 × 8 =
  32. 32.49 × 4 =
  33. 33.12 × 8 =
  34. 34.153 × 4 =
  35. 35.69 × 8 =
  36. 36.58 × 8 =
  37. 37.12 × 8 =
  38. 38.42 × 8 =
  39. 39.76 × 4 =
  40. 40.23 × 4 =

Answer key

  1. 328
  2. 168
  3. 328
  4. 192
  5. 248
  6. 580
  7. 412
  8. 448
  9. 496
  10. 168
  11. 192
  12. 204
  13. 168
  14. 136
  15. 516
  16. 56
  17. 604
  18. 500
  19. 188
  20. 584
  21. 592
  22. 288
  23. 576
  24. 452
  25. 320
  26. 336
  27. 136
  28. 432
  29. 64
  30. 604
  31. 344
  32. 196
  33. 96
  34. 612
  35. 552
  36. 464
  37. 96
  38. 336
  39. 304
  40. 92

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