← 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 291 · 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. 1.33 × 8 =
  2. 2.34 × 4 =
  3. 3.46 × 4 =
  4. 4.20 × 4 =
  5. 5.22 × 8 =
  6. 6.19 × 4 =
  7. 7.42 × 4 =
  8. 8.26 × 8 =
  9. 9.36 × 8 =
  10. 10.39 × 8 =
  11. 11.21 × 8 =
  12. 12.22 × 4 =
  13. 13.15 × 8 =
  14. 14.18 × 8 =
  15. 15.17 × 4 =
  16. 16.66 × 4 =
  17. 17.74 × 4 =
  18. 18.57 × 4 =
  19. 19.27 × 4 =
  20. 20.25 × 8 =
  21. 21.23 × 8 =
  22. 22.38 × 8 =
  23. 23.41 × 4 =
  24. 24.59 × 4 =
  25. 25.67 × 4 =
  26. 26.12 × 4 =
  27. 27.70 × 4 =
  28. 28.24 × 8 =
  29. 29.18 × 4 =
  30. 30.13 × 8 =
  31. 31.29 × 4 =
  32. 32.35 × 8 =
  33. 33.32 × 8 =
  34. 34.24 × 4 =
  35. 35.27 × 8 =
  36. 36.63 × 4 =
  37. 37.29 × 8 =
  38. 38.28 × 4 =
  39. 39.17 × 8 =
  40. 40.19 × 8 =

Answer key

  1. 264
  2. 136
  3. 184
  4. 80
  5. 176
  6. 76
  7. 168
  8. 208
  9. 288
  10. 312
  11. 168
  12. 88
  13. 120
  14. 144
  15. 68
  16. 264
  17. 296
  18. 228
  19. 108
  20. 200
  21. 184
  22. 304
  23. 164
  24. 236
  25. 268
  26. 48
  27. 280
  28. 192
  29. 72
  30. 104
  31. 116
  32. 280
  33. 256
  34. 96
  35. 216
  36. 252
  37. 232
  38. 112
  39. 136
  40. 152

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