← 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 221 · 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. 1.14 × 8 =
  2. 2.22 × 8 =
  3. 3.13 × 8 =
  4. 4.36 × 4 =
  5. 5.40 × 8 =
  6. 6.36 × 8 =
  7. 7.66 × 4 =
  8. 8.25 × 8 =
  9. 9.30 × 4 =
  10. 10.63 × 4 =
  11. 11.21 × 8 =
  12. 12.19 × 8 =
  13. 13.15 × 8 =
  14. 14.28 × 8 =
  15. 15.62 × 4 =
  16. 16.58 × 4 =
  17. 17.44 × 4 =
  18. 18.43 × 4 =
  19. 19.60 × 4 =
  20. 20.24 × 4 =
  21. 21.33 × 8 =
  22. 22.69 × 4 =
  23. 23.20 × 8 =
  24. 24.37 × 8 =
  25. 25.22 × 4 =
  26. 26.75 × 4 =
  27. 27.26 × 4 =
  28. 28.29 × 4 =
  29. 29.24 × 8 =
  30. 30.59 × 4 =
  31. 31.73 × 4 =
  32. 32.71 × 4 =
  33. 33.26 × 8 =
  34. 34.29 × 8 =
  35. 35.34 × 4 =
  36. 36.17 × 8 =
  37. 37.31 × 8 =
  38. 38.35 × 8 =
  39. 39.28 × 4 =
  40. 40.41 × 4 =

Answer key

  1. 112
  2. 176
  3. 104
  4. 144
  5. 320
  6. 288
  7. 264
  8. 200
  9. 120
  10. 252
  11. 168
  12. 152
  13. 120
  14. 224
  15. 248
  16. 232
  17. 176
  18. 172
  19. 240
  20. 96
  21. 264
  22. 276
  23. 160
  24. 296
  25. 88
  26. 300
  27. 104
  28. 116
  29. 192
  30. 236
  31. 292
  32. 284
  33. 208
  34. 232
  35. 136
  36. 136
  37. 248
  38. 280
  39. 112
  40. 164

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