← 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 876 · 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. 1.15 × 8 =
  2. 2.24 × 8 =
  3. 3.25 × 8 =
  4. 4.12 × 4 =
  5. 5.39 × 4 =
  6. 6.14 × 4 =
  7. 7.33 × 4 =
  8. 8.67 × 4 =
  9. 9.46 × 4 =
  10. 10.26 × 8 =
  11. 11.73 × 4 =
  12. 12.28 × 4 =
  13. 13.25 × 4 =
  14. 14.13 × 8 =
  15. 15.59 × 4 =
  16. 16.61 × 4 =
  17. 17.34 × 8 =
  18. 18.41 × 4 =
  19. 19.33 × 8 =
  20. 20.30 × 8 =
  21. 21.16 × 4 =
  22. 22.17 × 8 =
  23. 23.37 × 8 =
  24. 24.27 × 4 =
  25. 25.22 × 8 =
  26. 26.18 × 8 =
  27. 27.19 × 4 =
  28. 28.17 × 4 =
  29. 29.19 × 8 =
  30. 30.30 × 4 =
  31. 31.39 × 8 =
  32. 32.38 × 8 =
  33. 33.35 × 8 =
  34. 34.32 × 4 =
  35. 35.38 × 4 =
  36. 36.24 × 4 =
  37. 37.23 × 8 =
  38. 38.52 × 4 =
  39. 39.21 × 8 =
  40. 40.26 × 4 =

Answer key

  1. 120
  2. 192
  3. 200
  4. 48
  5. 156
  6. 56
  7. 132
  8. 268
  9. 184
  10. 208
  11. 292
  12. 112
  13. 100
  14. 104
  15. 236
  16. 244
  17. 272
  18. 164
  19. 264
  20. 240
  21. 64
  22. 136
  23. 296
  24. 108
  25. 176
  26. 144
  27. 76
  28. 68
  29. 152
  30. 120
  31. 312
  32. 304
  33. 280
  34. 128
  35. 152
  36. 96
  37. 184
  38. 208
  39. 168
  40. 104

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