← 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 97 · 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. 1.32 × 8 =
  2. 2.35 × 8 =
  3. 3.52 × 4 =
  4. 4.29 × 4 =
  5. 5.37 × 8 =
  6. 6.38 × 4 =
  7. 7.28 × 8 =
  8. 8.29 × 8 =
  9. 9.15 × 8 =
  10. 10.16 × 4 =
  11. 11.75 × 4 =
  12. 12.33 × 8 =
  13. 13.43 × 4 =
  14. 14.14 × 8 =
  15. 15.39 × 8 =
  16. 16.31 × 8 =
  17. 17.15 × 4 =
  18. 18.40 × 8 =
  19. 19.12 × 8 =
  20. 20.27 × 8 =
  21. 21.31 × 4 =
  22. 22.44 × 4 =
  23. 23.19 × 8 =
  24. 24.23 × 8 =
  25. 25.21 × 8 =
  26. 26.36 × 8 =
  27. 27.26 × 8 =
  28. 28.47 × 4 =
  29. 29.60 × 4 =
  30. 30.68 × 4 =
  31. 31.48 × 4 =
  32. 32.13 × 4 =
  33. 33.26 × 4 =
  34. 34.62 × 4 =
  35. 35.42 × 4 =
  36. 36.12 × 4 =
  37. 37.17 × 8 =
  38. 38.20 × 8 =
  39. 39.61 × 4 =
  40. 40.19 × 4 =

Answer key

  1. 256
  2. 280
  3. 208
  4. 116
  5. 296
  6. 152
  7. 224
  8. 232
  9. 120
  10. 64
  11. 300
  12. 264
  13. 172
  14. 112
  15. 312
  16. 248
  17. 60
  18. 320
  19. 96
  20. 216
  21. 124
  22. 176
  23. 152
  24. 184
  25. 168
  26. 288
  27. 208
  28. 188
  29. 240
  30. 272
  31. 192
  32. 52
  33. 104
  34. 248
  35. 168
  36. 48
  37. 136
  38. 160
  39. 244
  40. 76

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