← 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 133 · 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. 1.30 × 8 =
  2. 2.16 × 4 =
  3. 3.39 × 8 =
  4. 4.22 × 8 =
  5. 5.33 × 8 =
  6. 6.25 × 8 =
  7. 7.35 × 4 =
  8. 8.21 × 8 =
  9. 9.29 × 4 =
  10. 10.14 × 8 =
  11. 11.48 × 4 =
  12. 12.15 × 8 =
  13. 13.18 × 4 =
  14. 14.36 × 8 =
  15. 15.50 × 4 =
  16. 16.28 × 8 =
  17. 17.12 × 8 =
  18. 18.41 × 4 =
  19. 19.72 × 4 =
  20. 20.13 × 8 =
  21. 21.38 × 4 =
  22. 22.45 × 4 =
  23. 23.20 × 8 =
  24. 24.49 × 4 =
  25. 25.32 × 8 =
  26. 26.58 × 4 =
  27. 27.34 × 4 =
  28. 28.69 × 4 =
  29. 29.64 × 4 =
  30. 30.75 × 4 =
  31. 31.17 × 8 =
  32. 32.59 × 4 =
  33. 33.28 × 4 =
  34. 34.52 × 4 =
  35. 35.14 × 4 =
  36. 36.24 × 8 =
  37. 37.66 × 4 =
  38. 38.26 × 8 =
  39. 39.27 × 8 =
  40. 40.21 × 4 =

Answer key

  1. 240
  2. 64
  3. 312
  4. 176
  5. 264
  6. 200
  7. 140
  8. 168
  9. 116
  10. 112
  11. 192
  12. 120
  13. 72
  14. 288
  15. 200
  16. 224
  17. 96
  18. 164
  19. 288
  20. 104
  21. 152
  22. 180
  23. 160
  24. 196
  25. 256
  26. 232
  27. 136
  28. 276
  29. 256
  30. 300
  31. 136
  32. 236
  33. 112
  34. 208
  35. 56
  36. 192
  37. 264
  38. 208
  39. 216
  40. 84

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