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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 834 · 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. 1.31 × 8 =
  2. 2.72 × 8 =
  3. 3.103 × 4 =
  4. 4.116 × 4 =
  5. 5.96 × 4 =
  6. 6.88 × 4 =
  7. 7.56 × 4 =
  8. 8.23 × 8 =
  9. 9.61 × 8 =
  10. 10.43 × 8 =
  11. 11.57 × 4 =
  12. 12.122 × 4 =
  13. 13.17 × 4 =
  14. 14.138 × 4 =
  15. 15.62 × 8 =
  16. 16.53 × 4 =
  17. 17.46 × 8 =
  18. 18.13 × 4 =
  19. 19.116 × 4 =
  20. 20.19 × 8 =
  21. 21.72 × 4 =
  22. 22.85 × 4 =
  23. 23.33 × 8 =
  24. 24.22 × 8 =
  25. 25.43 × 4 =
  26. 26.25 × 4 =
  27. 27.80 × 4 =
  28. 28.103 × 4 =
  29. 29.65 × 8 =
  30. 30.101 × 4 =
  31. 31.23 × 8 =
  32. 32.13 × 4 =
  33. 33.73 × 8 =
  34. 34.15 × 8 =
  35. 35.27 × 8 =
  36. 36.54 × 4 =
  37. 37.23 × 8 =
  38. 38.49 × 8 =
  39. 39.75 × 8 =
  40. 40.19 × 8 =

Answer key

  1. 248
  2. 576
  3. 412
  4. 464
  5. 384
  6. 352
  7. 224
  8. 184
  9. 488
  10. 344
  11. 228
  12. 488
  13. 68
  14. 552
  15. 496
  16. 212
  17. 368
  18. 52
  19. 464
  20. 152
  21. 288
  22. 340
  23. 264
  24. 176
  25. 172
  26. 100
  27. 320
  28. 412
  29. 520
  30. 404
  31. 184
  32. 52
  33. 584
  34. 120
  35. 216
  36. 216
  37. 184
  38. 392
  39. 600
  40. 152

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