← 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 567 · 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. 1.21 × 8 =
  2. 2.34 × 8 =
  3. 3.70 × 4 =
  4. 4.23 × 4 =
  5. 5.12 × 4 =
  6. 6.40 × 8 =
  7. 7.15 × 8 =
  8. 8.17 × 8 =
  9. 9.19 × 8 =
  10. 10.67 × 4 =
  11. 11.24 × 4 =
  12. 12.20 × 8 =
  13. 13.33 × 8 =
  14. 14.66 × 4 =
  15. 15.74 × 4 =
  16. 16.36 × 4 =
  17. 17.18 × 4 =
  18. 18.26 × 8 =
  19. 19.37 × 4 =
  20. 20.28 × 8 =
  21. 21.16 × 4 =
  22. 22.26 × 4 =
  23. 23.45 × 4 =
  24. 24.34 × 4 =
  25. 25.19 × 4 =
  26. 26.39 × 4 =
  27. 27.41 × 4 =
  28. 28.30 × 4 =
  29. 29.38 × 4 =
  30. 30.58 × 4 =
  31. 31.33 × 4 =
  32. 32.60 × 4 =
  33. 33.40 × 4 =
  34. 34.21 × 4 =
  35. 35.36 × 8 =
  36. 36.75 × 4 =
  37. 37.13 × 4 =
  38. 38.22 × 8 =
  39. 39.14 × 8 =
  40. 40.18 × 8 =

Answer key

  1. 168
  2. 272
  3. 280
  4. 92
  5. 48
  6. 320
  7. 120
  8. 136
  9. 152
  10. 268
  11. 96
  12. 160
  13. 264
  14. 264
  15. 296
  16. 144
  17. 72
  18. 208
  19. 148
  20. 224
  21. 64
  22. 104
  23. 180
  24. 136
  25. 76
  26. 156
  27. 164
  28. 120
  29. 152
  30. 232
  31. 132
  32. 240
  33. 160
  34. 84
  35. 288
  36. 300
  37. 52
  38. 176
  39. 112
  40. 144

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