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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 731 · 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. 2.36 × 8 =
  3. 3.24 × 8 =
  4. 4.17 × 4 =
  5. 5.28 × 8 =
  6. 6.51 × 4 =
  7. 7.13 × 4 =
  8. 8.34 × 4 =
  9. 9.24 × 4 =
  10. 10.12 × 8 =
  11. 11.14 × 8 =
  12. 12.22 × 8 =
  13. 13.21 × 8 =
  14. 14.70 × 4 =
  15. 15.58 × 4 =
  16. 16.14 × 4 =
  17. 17.49 × 4 =
  18. 18.26 × 8 =
  19. 19.15 × 8 =
  20. 20.33 × 8 =
  21. 21.74 × 4 =
  22. 22.48 × 4 =
  23. 23.41 × 4 =
  24. 24.31 × 8 =
  25. 25.26 × 4 =
  26. 26.25 × 8 =
  27. 27.53 × 4 =
  28. 28.35 × 8 =
  29. 29.61 × 4 =
  30. 30.23 × 8 =
  31. 31.15 × 4 =
  32. 32.13 × 8 =
  33. 33.47 × 4 =
  34. 34.19 × 4 =
  35. 35.27 × 4 =
  36. 36.42 × 4 =
  37. 37.17 × 8 =
  38. 38.32 × 8 =
  39. 39.25 × 4 =
  40. 40.12 × 4 =

Answer key

  1. 240
  2. 288
  3. 192
  4. 68
  5. 224
  6. 204
  7. 52
  8. 136
  9. 96
  10. 96
  11. 112
  12. 176
  13. 168
  14. 280
  15. 232
  16. 56
  17. 196
  18. 208
  19. 120
  20. 264
  21. 296
  22. 192
  23. 164
  24. 248
  25. 104
  26. 200
  27. 212
  28. 280
  29. 244
  30. 184
  31. 60
  32. 104
  33. 188
  34. 76
  35. 108
  36. 168
  37. 136
  38. 256
  39. 100
  40. 48

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