← 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 705 · 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. 1.36 × 4 =
  2. 2.38 × 8 =
  3. 3.19 × 8 =
  4. 4.15 × 8 =
  5. 5.47 × 4 =
  6. 6.16 × 8 =
  7. 7.20 × 8 =
  8. 8.64 × 4 =
  9. 9.25 × 8 =
  10. 10.25 × 4 =
  11. 11.32 × 8 =
  12. 12.73 × 4 =
  13. 13.14 × 8 =
  14. 14.31 × 4 =
  15. 15.13 × 4 =
  16. 16.21 × 4 =
  17. 17.44 × 4 =
  18. 18.16 × 4 =
  19. 19.17 × 8 =
  20. 20.30 × 4 =
  21. 21.59 × 4 =
  22. 22.34 × 4 =
  23. 23.56 × 4 =
  24. 24.29 × 8 =
  25. 25.69 × 4 =
  26. 26.27 × 4 =
  27. 27.49 × 4 =
  28. 28.37 × 4 =
  29. 29.62 × 4 =
  30. 30.34 × 8 =
  31. 31.29 × 4 =
  32. 32.26 × 8 =
  33. 33.33 × 8 =
  34. 34.30 × 8 =
  35. 35.38 × 4 =
  36. 36.15 × 4 =
  37. 37.24 × 8 =
  38. 38.27 × 8 =
  39. 39.32 × 4 =
  40. 40.42 × 4 =

Answer key

  1. 144
  2. 304
  3. 152
  4. 120
  5. 188
  6. 128
  7. 160
  8. 256
  9. 200
  10. 100
  11. 256
  12. 292
  13. 112
  14. 124
  15. 52
  16. 84
  17. 176
  18. 64
  19. 136
  20. 120
  21. 236
  22. 136
  23. 224
  24. 232
  25. 276
  26. 108
  27. 196
  28. 148
  29. 248
  30. 272
  31. 116
  32. 208
  33. 264
  34. 240
  35. 152
  36. 60
  37. 192
  38. 216
  39. 128
  40. 168

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