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

Multiply by 4 and 8 Worksheet

Speed calculation lesson 6: Doubling sprints: × 4 and × 8 · Set 15 · 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. 1.156 × 4 =
  2. 2.35 × 4 =
  3. 3.24 × 8 =
  4. 4.26 × 8 =
  5. 5.93 × 4 =
  6. 6.44 × 8 =
  7. 7.21 × 8 =
  8. 8.52 × 4 =
  9. 9.29 × 4 =
  10. 10.146 × 4 =
  11. 11.100 × 4 =
  12. 12.40 × 4 =
  13. 13.148 × 4 =
  14. 14.101 × 4 =
  15. 15.107 × 4 =
  16. 16.116 × 4 =
  17. 17.108 × 4 =
  18. 18.49 × 4 =
  19. 19.15 × 4 =
  20. 20.133 × 4 =
  21. 21.140 × 4 =
  22. 22.37 × 4 =
  23. 23.48 × 4 =
  24. 24.28 × 8 =
  25. 25.43 × 4 =
  26. 26.30 × 4 =
  27. 27.76 × 4 =
  28. 28.33 × 8 =
  29. 29.91 × 4 =
  30. 30.30 × 8 =
  31. 31.24 × 8 =
  32. 32.17 × 8 =
  33. 33.49 × 4 =
  34. 34.125 × 4 =
  35. 35.16 × 8 =
  36. 36.42 × 4 =
  37. 37.65 × 8 =
  38. 38.26 × 8 =
  39. 39.46 × 8 =
  40. 40.19 × 8 =

Answer key

  1. 624
  2. 140
  3. 192
  4. 208
  5. 372
  6. 352
  7. 168
  8. 208
  9. 116
  10. 584
  11. 400
  12. 160
  13. 592
  14. 404
  15. 428
  16. 464
  17. 432
  18. 196
  19. 60
  20. 532
  21. 560
  22. 148
  23. 192
  24. 224
  25. 172
  26. 120
  27. 304
  28. 264
  29. 364
  30. 240
  31. 192
  32. 136
  33. 196
  34. 500
  35. 128
  36. 168
  37. 520
  38. 208
  39. 368
  40. 152

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