← 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 110 · 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. 1.18 × 8 =
  2. 2.20 × 4 =
  3. 3.43 × 4 =
  4. 4.13 × 8 =
  5. 5.70 × 4 =
  6. 6.12 × 8 =
  7. 7.40 × 8 =
  8. 8.42 × 4 =
  9. 9.33 × 8 =
  10. 10.16 × 4 =
  11. 11.39 × 8 =
  12. 12.17 × 8 =
  13. 13.22 × 8 =
  14. 14.58 × 4 =
  15. 15.35 × 4 =
  16. 16.72 × 4 =
  17. 17.53 × 4 =
  18. 18.14 × 8 =
  19. 19.38 × 4 =
  20. 20.17 × 4 =
  21. 21.25 × 8 =
  22. 22.32 × 4 =
  23. 23.23 × 8 =
  24. 24.32 × 8 =
  25. 25.56 × 4 =
  26. 26.66 × 4 =
  27. 27.38 × 8 =
  28. 28.30 × 4 =
  29. 29.15 × 4 =
  30. 30.39 × 4 =
  31. 31.65 × 4 =
  32. 32.31 × 8 =
  33. 33.20 × 8 =
  34. 34.37 × 8 =
  35. 35.26 × 8 =
  36. 36.68 × 4 =
  37. 37.29 × 4 =
  38. 38.19 × 4 =
  39. 39.29 × 8 =
  40. 40.69 × 4 =

Answer key

  1. 144
  2. 80
  3. 172
  4. 104
  5. 280
  6. 96
  7. 320
  8. 168
  9. 264
  10. 64
  11. 312
  12. 136
  13. 176
  14. 232
  15. 140
  16. 288
  17. 212
  18. 112
  19. 152
  20. 68
  21. 200
  22. 128
  23. 184
  24. 256
  25. 224
  26. 264
  27. 304
  28. 120
  29. 60
  30. 156
  31. 260
  32. 248
  33. 160
  34. 296
  35. 208
  36. 272
  37. 116
  38. 76
  39. 232
  40. 276

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