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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 522 · 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. 1.12 × 8 =
  2. 2.62 × 4 =
  3. 3.33 × 4 =
  4. 4.38 × 4 =
  5. 5.19 × 8 =
  6. 6.18 × 8 =
  7. 7.36 × 8 =
  8. 8.19 × 4 =
  9. 9.71 × 4 =
  10. 10.32 × 8 =
  11. 11.34 × 8 =
  12. 12.30 × 8 =
  13. 13.24 × 8 =
  14. 14.23 × 8 =
  15. 15.44 × 4 =
  16. 16.21 × 8 =
  17. 17.17 × 8 =
  18. 18.16 × 8 =
  19. 19.27 × 4 =
  20. 20.13 × 8 =
  21. 21.35 × 8 =
  22. 22.30 × 4 =
  23. 23.66 × 4 =
  24. 24.68 × 4 =
  25. 25.47 × 4 =
  26. 26.22 × 4 =
  27. 27.24 × 4 =
  28. 28.14 × 8 =
  29. 29.34 × 4 =
  30. 30.33 × 8 =
  31. 31.20 × 4 =
  32. 32.75 × 4 =
  33. 33.73 × 4 =
  34. 34.20 × 8 =
  35. 35.41 × 4 =
  36. 36.64 × 4 =
  37. 37.29 × 8 =
  38. 38.40 × 8 =
  39. 39.48 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 96
  2. 248
  3. 132
  4. 152
  5. 152
  6. 144
  7. 288
  8. 76
  9. 284
  10. 256
  11. 272
  12. 240
  13. 192
  14. 184
  15. 176
  16. 168
  17. 136
  18. 128
  19. 108
  20. 104
  21. 280
  22. 120
  23. 264
  24. 272
  25. 188
  26. 88
  27. 96
  28. 112
  29. 136
  30. 264
  31. 80
  32. 300
  33. 292
  34. 160
  35. 164
  36. 256
  37. 232
  38. 320
  39. 192
  40. 312

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