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Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 235 · 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. 1.23 × 4 =
  2. 2.47 × 4 =
  3. 3.57 × 4 =
  4. 4.33 × 8 =
  5. 5.24 × 4 =
  6. 6.49 × 4 =
  7. 7.61 × 8 =
  8. 8.45 × 8 =
  9. 9.100 × 4 =
  10. 10.24 × 8 =
  11. 11.31 × 8 =
  12. 12.126 × 4 =
  13. 13.120 × 4 =
  14. 14.55 × 8 =
  15. 15.59 × 4 =
  16. 16.125 × 4 =
  17. 17.30 × 8 =
  18. 18.73 × 8 =
  19. 19.150 × 4 =
  20. 20.15 × 4 =
  21. 21.62 × 4 =
  22. 22.139 × 4 =
  23. 23.114 × 4 =
  24. 24.34 × 8 =
  25. 25.21 × 8 =
  26. 26.106 × 4 =
  27. 27.66 × 4 =
  28. 28.57 × 8 =
  29. 29.58 × 8 =
  30. 30.32 × 8 =
  31. 31.134 × 4 =
  32. 32.22 × 8 =
  33. 33.37 × 8 =
  34. 34.99 × 4 =
  35. 35.26 × 4 =
  36. 36.16 × 8 =
  37. 37.111 × 4 =
  38. 38.36 × 8 =
  39. 39.19 × 4 =
  40. 40.159 × 4 =

Answer key

  1. 92
  2. 188
  3. 228
  4. 264
  5. 96
  6. 196
  7. 488
  8. 360
  9. 400
  10. 192
  11. 248
  12. 504
  13. 480
  14. 440
  15. 236
  16. 500
  17. 240
  18. 584
  19. 600
  20. 60
  21. 248
  22. 556
  23. 456
  24. 272
  25. 168
  26. 424
  27. 264
  28. 456
  29. 464
  30. 256
  31. 536
  32. 176
  33. 296
  34. 396
  35. 104
  36. 128
  37. 444
  38. 288
  39. 76
  40. 636

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