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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 334 · 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. 1.18 × 8 =
  2. 2.48 × 4 =
  3. 3.26 × 8 =
  4. 4.158 × 4 =
  5. 5.68 × 8 =
  6. 6.75 × 4 =
  7. 7.39 × 8 =
  8. 8.19 × 8 =
  9. 9.126 × 4 =
  10. 10.94 × 4 =
  11. 11.54 × 8 =
  12. 12.51 × 8 =
  13. 13.27 × 8 =
  14. 14.156 × 4 =
  15. 15.21 × 8 =
  16. 16.120 × 4 =
  17. 17.28 × 8 =
  18. 18.54 × 8 =
  19. 19.143 × 4 =
  20. 20.112 × 4 =
  21. 21.150 × 4 =
  22. 22.24 × 8 =
  23. 23.58 × 4 =
  24. 24.32 × 4 =
  25. 25.35 × 4 =
  26. 26.20 × 8 =
  27. 27.70 × 8 =
  28. 28.22 × 4 =
  29. 29.61 × 4 =
  30. 30.15 × 8 =
  31. 31.64 × 8 =
  32. 32.129 × 4 =
  33. 33.55 × 4 =
  34. 34.13 × 8 =
  35. 35.69 × 4 =
  36. 36.42 × 8 =
  37. 37.98 × 4 =
  38. 38.34 × 8 =
  39. 39.77 × 4 =
  40. 40.60 × 8 =

Answer key

  1. 144
  2. 192
  3. 208
  4. 632
  5. 544
  6. 300
  7. 312
  8. 152
  9. 504
  10. 376
  11. 432
  12. 408
  13. 216
  14. 624
  15. 168
  16. 480
  17. 224
  18. 432
  19. 572
  20. 448
  21. 600
  22. 192
  23. 232
  24. 128
  25. 140
  26. 160
  27. 560
  28. 88
  29. 244
  30. 120
  31. 512
  32. 516
  33. 220
  34. 104
  35. 276
  36. 336
  37. 392
  38. 272
  39. 308
  40. 480

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