← Multiply by 4 and 8 by doubling lesson New set →

Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 56 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.24 × 8 =
  2. 2.27 × 4 =
  3. 3.27 × 8 =
  4. 4.37 × 8 =
  5. 5.21 × 4 =
  6. 6.16 × 4 =
  7. 7.71 × 4 =
  8. 8.32 × 8 =
  9. 9.17 × 4 =
  10. 10.23 × 4 =
  11. 11.31 × 8 =
  12. 12.54 × 4 =
  13. 13.59 × 4 =
  14. 14.23 × 8 =
  15. 15.14 × 8 =
  16. 16.15 × 4 =
  17. 17.12 × 4 =
  18. 18.18 × 8 =
  19. 19.74 × 4 =
  20. 20.52 × 4 =
  21. 21.75 × 4 =
  22. 22.29 × 8 =
  23. 23.15 × 8 =
  24. 24.66 × 4 =
  25. 25.70 × 4 =
  26. 26.20 × 8 =
  27. 27.34 × 4 =
  28. 28.12 × 8 =
  29. 29.22 × 4 =
  30. 30.40 × 8 =
  31. 31.47 × 4 =
  32. 32.26 × 4 =
  33. 33.20 × 4 =
  34. 34.58 × 4 =
  35. 35.33 × 8 =
  36. 36.19 × 8 =
  37. 37.28 × 4 =
  38. 38.39 × 8 =
  39. 39.65 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 192
  2. 108
  3. 216
  4. 296
  5. 84
  6. 64
  7. 284
  8. 256
  9. 68
  10. 92
  11. 248
  12. 216
  13. 236
  14. 184
  15. 112
  16. 60
  17. 48
  18. 144
  19. 296
  20. 208
  21. 300
  22. 232
  23. 120
  24. 264
  25. 280
  26. 160
  27. 136
  28. 96
  29. 88
  30. 320
  31. 188
  32. 104
  33. 80
  34. 232
  35. 264
  36. 152
  37. 112
  38. 312
  39. 260
  40. 268

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