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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 672 · 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. 1.13 × 8 =
  2. 2.46 × 4 =
  3. 3.23 × 8 =
  4. 4.26 × 8 =
  5. 5.34 × 8 =
  6. 6.17 × 8 =
  7. 7.37 × 8 =
  8. 8.39 × 8 =
  9. 9.23 × 4 =
  10. 10.32 × 8 =
  11. 11.22 × 4 =
  12. 12.63 × 4 =
  13. 13.44 × 4 =
  14. 14.40 × 8 =
  15. 15.22 × 8 =
  16. 16.58 × 4 =
  17. 17.13 × 4 =
  18. 18.36 × 4 =
  19. 19.16 × 8 =
  20. 20.34 × 4 =
  21. 21.33 × 8 =
  22. 22.14 × 8 =
  23. 23.20 × 4 =
  24. 24.19 × 4 =
  25. 25.21 × 4 =
  26. 26.19 × 8 =
  27. 27.52 × 4 =
  28. 28.28 × 4 =
  29. 29.65 × 4 =
  30. 30.64 × 4 =
  31. 31.67 × 4 =
  32. 32.21 × 8 =
  33. 33.73 × 4 =
  34. 34.29 × 8 =
  35. 35.25 × 4 =
  36. 36.27 × 4 =
  37. 37.70 × 4 =
  38. 38.40 × 4 =
  39. 39.12 × 8 =
  40. 40.24 × 8 =

Answer key

  1. 104
  2. 184
  3. 184
  4. 208
  5. 272
  6. 136
  7. 296
  8. 312
  9. 92
  10. 256
  11. 88
  12. 252
  13. 176
  14. 320
  15. 176
  16. 232
  17. 52
  18. 144
  19. 128
  20. 136
  21. 264
  22. 112
  23. 80
  24. 76
  25. 84
  26. 152
  27. 208
  28. 112
  29. 260
  30. 256
  31. 268
  32. 168
  33. 292
  34. 232
  35. 100
  36. 108
  37. 280
  38. 160
  39. 96
  40. 192

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