← 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 814 · 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. 1.66 × 4 =
  2. 2.38 × 8 =
  3. 3.12 × 8 =
  4. 4.22 × 4 =
  5. 5.28 × 4 =
  6. 6.13 × 4 =
  7. 7.31 × 8 =
  8. 8.72 × 4 =
  9. 9.28 × 8 =
  10. 10.36 × 8 =
  11. 11.34 × 4 =
  12. 12.15 × 4 =
  13. 13.23 × 8 =
  14. 14.17 × 8 =
  15. 15.29 × 8 =
  16. 16.25 × 8 =
  17. 17.13 × 8 =
  18. 18.16 × 4 =
  19. 19.41 × 4 =
  20. 20.59 × 4 =
  21. 21.21 × 8 =
  22. 22.39 × 8 =
  23. 23.43 × 4 =
  24. 24.51 × 4 =
  25. 25.65 × 4 =
  26. 26.19 × 8 =
  27. 27.23 × 4 =
  28. 28.49 × 4 =
  29. 29.17 × 4 =
  30. 30.35 × 4 =
  31. 31.24 × 4 =
  32. 32.61 × 4 =
  33. 33.30 × 4 =
  34. 34.27 × 8 =
  35. 35.15 × 8 =
  36. 36.64 × 4 =
  37. 37.75 × 4 =
  38. 38.14 × 8 =
  39. 39.52 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 264
  2. 304
  3. 96
  4. 88
  5. 112
  6. 52
  7. 248
  8. 288
  9. 224
  10. 288
  11. 136
  12. 60
  13. 184
  14. 136
  15. 232
  16. 200
  17. 104
  18. 64
  19. 164
  20. 236
  21. 168
  22. 312
  23. 172
  24. 204
  25. 260
  26. 152
  27. 92
  28. 196
  29. 68
  30. 140
  31. 96
  32. 244
  33. 120
  34. 216
  35. 120
  36. 256
  37. 300
  38. 112
  39. 208
  40. 292

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