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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 498 · 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. 1.19 × 8 =
  2. 2.63 × 8 =
  3. 3.57 × 8 =
  4. 4.22 × 8 =
  5. 5.50 × 8 =
  6. 6.159 × 4 =
  7. 7.19 × 8 =
  8. 8.64 × 8 =
  9. 9.139 × 4 =
  10. 10.39 × 4 =
  11. 11.69 × 8 =
  12. 12.68 × 8 =
  13. 13.17 × 4 =
  14. 14.75 × 4 =
  15. 15.56 × 4 =
  16. 16.127 × 4 =
  17. 17.60 × 8 =
  18. 18.21 × 4 =
  19. 19.74 × 4 =
  20. 20.95 × 4 =
  21. 21.42 × 4 =
  22. 22.18 × 8 =
  23. 23.27 × 8 =
  24. 24.126 × 4 =
  25. 25.136 × 4 =
  26. 26.63 × 8 =
  27. 27.30 × 4 =
  28. 28.134 × 4 =
  29. 29.14 × 8 =
  30. 30.86 × 4 =
  31. 31.24 × 8 =
  32. 32.14 × 8 =
  33. 33.139 × 4 =
  34. 34.27 × 8 =
  35. 35.106 × 4 =
  36. 36.52 × 8 =
  37. 37.45 × 8 =
  38. 38.130 × 4 =
  39. 39.107 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 152
  2. 504
  3. 456
  4. 176
  5. 400
  6. 636
  7. 152
  8. 512
  9. 556
  10. 156
  11. 552
  12. 544
  13. 68
  14. 300
  15. 224
  16. 508
  17. 480
  18. 84
  19. 296
  20. 380
  21. 168
  22. 144
  23. 216
  24. 504
  25. 544
  26. 504
  27. 120
  28. 536
  29. 112
  30. 344
  31. 192
  32. 112
  33. 556
  34. 216
  35. 424
  36. 416
  37. 360
  38. 520
  39. 428
  40. 192

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