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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 682 · 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. 1.40 × 8 =
  2. 2.26 × 4 =
  3. 3.24 × 4 =
  4. 4.27 × 8 =
  5. 5.12 × 8 =
  6. 6.25 × 8 =
  7. 7.33 × 8 =
  8. 8.30 × 8 =
  9. 9.34 × 8 =
  10. 10.35 × 8 =
  11. 11.18 × 8 =
  12. 12.23 × 4 =
  13. 13.22 × 8 =
  14. 14.51 × 4 =
  15. 15.21 × 8 =
  16. 16.56 × 4 =
  17. 17.27 × 4 =
  18. 18.17 × 8 =
  19. 19.15 × 8 =
  20. 20.23 × 8 =
  21. 21.58 × 4 =
  22. 22.45 × 4 =
  23. 23.36 × 8 =
  24. 24.30 × 4 =
  25. 25.14 × 8 =
  26. 26.31 × 4 =
  27. 27.19 × 8 =
  28. 28.39 × 4 =
  29. 29.25 × 4 =
  30. 30.15 × 4 =
  31. 31.75 × 4 =
  32. 32.14 × 4 =
  33. 33.17 × 4 =
  34. 34.19 × 4 =
  35. 35.29 × 8 =
  36. 36.60 × 4 =
  37. 37.28 × 4 =
  38. 38.29 × 4 =
  39. 39.13 × 8 =
  40. 40.47 × 4 =

Answer key

  1. 320
  2. 104
  3. 96
  4. 216
  5. 96
  6. 200
  7. 264
  8. 240
  9. 272
  10. 280
  11. 144
  12. 92
  13. 176
  14. 204
  15. 168
  16. 224
  17. 108
  18. 136
  19. 120
  20. 184
  21. 232
  22. 180
  23. 288
  24. 120
  25. 112
  26. 124
  27. 152
  28. 156
  29. 100
  30. 60
  31. 300
  32. 56
  33. 68
  34. 76
  35. 232
  36. 240
  37. 112
  38. 116
  39. 104
  40. 188

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