← 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 754 · 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. 1.38 × 4 =
  2. 2.37 × 8 =
  3. 3.72 × 4 =
  4. 4.47 × 4 =
  5. 5.29 × 8 =
  6. 6.48 × 4 =
  7. 7.31 × 8 =
  8. 8.27 × 8 =
  9. 9.17 × 8 =
  10. 10.21 × 4 =
  11. 11.33 × 8 =
  12. 12.13 × 8 =
  13. 13.35 × 4 =
  14. 14.29 × 4 =
  15. 15.73 × 4 =
  16. 16.19 × 4 =
  17. 17.18 × 8 =
  18. 18.37 × 4 =
  19. 19.45 × 4 =
  20. 20.20 × 4 =
  21. 21.12 × 8 =
  22. 22.61 × 4 =
  23. 23.49 × 4 =
  24. 24.19 × 8 =
  25. 25.59 × 4 =
  26. 26.34 × 4 =
  27. 27.44 × 4 =
  28. 28.25 × 8 =
  29. 29.39 × 8 =
  30. 30.36 × 4 =
  31. 31.27 × 4 =
  32. 32.64 × 4 =
  33. 33.43 × 4 =
  34. 34.24 × 8 =
  35. 35.23 × 4 =
  36. 36.12 × 4 =
  37. 37.22 × 4 =
  38. 38.35 × 8 =
  39. 39.15 × 8 =
  40. 40.66 × 4 =

Answer key

  1. 152
  2. 296
  3. 288
  4. 188
  5. 232
  6. 192
  7. 248
  8. 216
  9. 136
  10. 84
  11. 264
  12. 104
  13. 140
  14. 116
  15. 292
  16. 76
  17. 144
  18. 148
  19. 180
  20. 80
  21. 96
  22. 244
  23. 196
  24. 152
  25. 236
  26. 136
  27. 176
  28. 200
  29. 312
  30. 144
  31. 108
  32. 256
  33. 172
  34. 192
  35. 92
  36. 48
  37. 88
  38. 280
  39. 120
  40. 264

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