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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 135 · 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. 2.76 × 4 =
  3. 3.61 × 8 =
  4. 4.117 × 4 =
  5. 5.75 × 4 =
  6. 6.13 × 4 =
  7. 7.61 × 8 =
  8. 8.58 × 8 =
  9. 9.138 × 4 =
  10. 10.159 × 4 =
  11. 11.47 × 4 =
  12. 12.34 × 4 =
  13. 13.145 × 4 =
  14. 14.64 × 8 =
  15. 15.40 × 8 =
  16. 16.40 × 8 =
  17. 17.100 × 4 =
  18. 18.110 × 4 =
  19. 19.29 × 8 =
  20. 20.116 × 4 =
  21. 21.64 × 8 =
  22. 22.69 × 4 =
  23. 23.28 × 8 =
  24. 24.37 × 8 =
  25. 25.98 × 4 =
  26. 26.58 × 4 =
  27. 27.105 × 4 =
  28. 28.23 × 4 =
  29. 29.103 × 4 =
  30. 30.68 × 8 =
  31. 31.34 × 4 =
  32. 32.160 × 4 =
  33. 33.60 × 8 =
  34. 34.35 × 8 =
  35. 35.16 × 8 =
  36. 36.40 × 4 =
  37. 37.49 × 8 =
  38. 38.27 × 8 =
  39. 39.140 × 4 =
  40. 40.55 × 4 =

Answer key

  1. 248
  2. 304
  3. 488
  4. 468
  5. 300
  6. 52
  7. 488
  8. 464
  9. 552
  10. 636
  11. 188
  12. 136
  13. 580
  14. 512
  15. 320
  16. 320
  17. 400
  18. 440
  19. 232
  20. 464
  21. 512
  22. 276
  23. 224
  24. 296
  25. 392
  26. 232
  27. 420
  28. 92
  29. 412
  30. 544
  31. 136
  32. 640
  33. 480
  34. 280
  35. 128
  36. 160
  37. 392
  38. 216
  39. 560
  40. 220

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