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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 339 · 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. 1.22 × 8 =
  2. 2.79 × 4 =
  3. 3.13 × 8 =
  4. 4.150 × 4 =
  5. 5.104 × 4 =
  6. 6.14 × 8 =
  7. 7.59 × 8 =
  8. 8.45 × 8 =
  9. 9.129 × 4 =
  10. 10.12 × 8 =
  11. 11.123 × 4 =
  12. 12.19 × 8 =
  13. 13.29 × 8 =
  14. 14.120 × 4 =
  15. 15.35 × 4 =
  16. 16.48 × 4 =
  17. 17.42 × 4 =
  18. 18.32 × 8 =
  19. 19.91 × 4 =
  20. 20.25 × 8 =
  21. 21.16 × 8 =
  22. 22.75 × 8 =
  23. 23.17 × 4 =
  24. 24.40 × 4 =
  25. 25.150 × 4 =
  26. 26.45 × 8 =
  27. 27.37 × 8 =
  28. 28.23 × 8 =
  29. 29.23 × 8 =
  30. 30.42 × 4 =
  31. 31.107 × 4 =
  32. 32.85 × 4 =
  33. 33.20 × 8 =
  34. 34.56 × 8 =
  35. 35.62 × 8 =
  36. 36.108 × 4 =
  37. 37.49 × 4 =
  38. 38.15 × 8 =
  39. 39.31 × 4 =
  40. 40.153 × 4 =

Answer key

  1. 176
  2. 316
  3. 104
  4. 600
  5. 416
  6. 112
  7. 472
  8. 360
  9. 516
  10. 96
  11. 492
  12. 152
  13. 232
  14. 480
  15. 140
  16. 192
  17. 168
  18. 256
  19. 364
  20. 200
  21. 128
  22. 600
  23. 68
  24. 160
  25. 600
  26. 360
  27. 296
  28. 184
  29. 184
  30. 168
  31. 428
  32. 340
  33. 160
  34. 448
  35. 496
  36. 432
  37. 196
  38. 120
  39. 124
  40. 612

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