← Doubling sprints: × 4 and × 8 lesson New set →

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 152 · 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. 1.72 × 8 =
  2. 2.116 × 4 =
  3. 3.35 × 4 =
  4. 4.62 × 8 =
  5. 5.60 × 4 =
  6. 6.51 × 8 =
  7. 7.26 × 8 =
  8. 8.91 × 4 =
  9. 9.44 × 4 =
  10. 10.40 × 4 =
  11. 11.17 × 4 =
  12. 12.32 × 4 =
  13. 13.34 × 4 =
  14. 14.72 × 8 =
  15. 15.42 × 4 =
  16. 16.117 × 4 =
  17. 17.18 × 4 =
  18. 18.144 × 4 =
  19. 19.38 × 8 =
  20. 20.61 × 8 =
  21. 21.74 × 8 =
  22. 22.122 × 4 =
  23. 23.53 × 8 =
  24. 24.149 × 4 =
  25. 25.24 × 8 =
  26. 26.113 × 4 =
  27. 27.140 × 4 =
  28. 28.156 × 4 =
  29. 29.151 × 4 =
  30. 30.57 × 8 =
  31. 31.38 × 4 =
  32. 32.40 × 8 =
  33. 33.107 × 4 =
  34. 34.140 × 4 =
  35. 35.19 × 4 =
  36. 36.19 × 4 =
  37. 37.65 × 4 =
  38. 38.73 × 8 =
  39. 39.40 × 4 =
  40. 40.159 × 4 =

Answer key

  1. 576
  2. 464
  3. 140
  4. 496
  5. 240
  6. 408
  7. 208
  8. 364
  9. 176
  10. 160
  11. 68
  12. 128
  13. 136
  14. 576
  15. 168
  16. 468
  17. 72
  18. 576
  19. 304
  20. 488
  21. 592
  22. 488
  23. 424
  24. 596
  25. 192
  26. 452
  27. 560
  28. 624
  29. 604
  30. 456
  31. 152
  32. 320
  33. 428
  34. 560
  35. 76
  36. 76
  37. 260
  38. 584
  39. 160
  40. 636

Free speed calculation lessons, practice and worksheets at talentjr.in/speed-maths