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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 383 · 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. 1.16 × 8 =
  2. 2.44 × 4 =
  3. 3.27 × 8 =
  4. 4.31 × 4 =
  5. 5.106 × 4 =
  6. 6.67 × 4 =
  7. 7.28 × 4 =
  8. 8.109 × 4 =
  9. 9.28 × 4 =
  10. 10.49 × 8 =
  11. 11.154 × 4 =
  12. 12.86 × 4 =
  13. 13.146 × 4 =
  14. 14.130 × 4 =
  15. 15.63 × 4 =
  16. 16.67 × 8 =
  17. 17.46 × 8 =
  18. 18.75 × 4 =
  19. 19.93 × 4 =
  20. 20.118 × 4 =
  21. 21.123 × 4 =
  22. 22.31 × 8 =
  23. 23.69 × 8 =
  24. 24.16 × 8 =
  25. 25.25 × 8 =
  26. 26.35 × 4 =
  27. 27.31 × 8 =
  28. 28.25 × 4 =
  29. 29.58 × 8 =
  30. 30.125 × 4 =
  31. 31.43 × 4 =
  32. 32.45 × 8 =
  33. 33.54 × 4 =
  34. 34.26 × 8 =
  35. 35.56 × 4 =
  36. 36.35 × 4 =
  37. 37.18 × 8 =
  38. 38.44 × 8 =
  39. 39.116 × 4 =
  40. 40.55 × 8 =

Answer key

  1. 128
  2. 176
  3. 216
  4. 124
  5. 424
  6. 268
  7. 112
  8. 436
  9. 112
  10. 392
  11. 616
  12. 344
  13. 584
  14. 520
  15. 252
  16. 536
  17. 368
  18. 300
  19. 372
  20. 472
  21. 492
  22. 248
  23. 552
  24. 128
  25. 200
  26. 140
  27. 248
  28. 100
  29. 464
  30. 500
  31. 172
  32. 360
  33. 216
  34. 208
  35. 224
  36. 140
  37. 144
  38. 352
  39. 464
  40. 440

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