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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 377 · 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. 1.25 × 8 =
  2. 2.24 × 8 =
  3. 3.33 × 8 =
  4. 4.14 × 8 =
  5. 5.67 × 4 =
  6. 6.21 × 8 =
  7. 7.17 × 8 =
  8. 8.15 × 8 =
  9. 9.29 × 8 =
  10. 10.62 × 4 =
  11. 11.48 × 4 =
  12. 12.42 × 4 =
  13. 13.31 × 8 =
  14. 14.47 × 4 =
  15. 15.38 × 8 =
  16. 16.51 × 4 =
  17. 17.44 × 4 =
  18. 18.18 × 8 =
  19. 19.13 × 4 =
  20. 20.16 × 4 =
  21. 21.22 × 8 =
  22. 22.53 × 4 =
  23. 23.37 × 8 =
  24. 24.40 × 8 =
  25. 25.33 × 4 =
  26. 26.24 × 4 =
  27. 27.16 × 8 =
  28. 28.28 × 8 =
  29. 29.32 × 8 =
  30. 30.30 × 4 =
  31. 31.36 × 8 =
  32. 32.32 × 4 =
  33. 33.39 × 8 =
  34. 34.27 × 4 =
  35. 35.34 × 4 =
  36. 36.25 × 4 =
  37. 37.63 × 4 =
  38. 38.19 × 8 =
  39. 39.23 × 8 =
  40. 40.66 × 4 =

Answer key

  1. 200
  2. 192
  3. 264
  4. 112
  5. 268
  6. 168
  7. 136
  8. 120
  9. 232
  10. 248
  11. 192
  12. 168
  13. 248
  14. 188
  15. 304
  16. 204
  17. 176
  18. 144
  19. 52
  20. 64
  21. 176
  22. 212
  23. 296
  24. 320
  25. 132
  26. 96
  27. 128
  28. 224
  29. 256
  30. 120
  31. 288
  32. 128
  33. 312
  34. 108
  35. 136
  36. 100
  37. 252
  38. 152
  39. 184
  40. 264

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