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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 194 · 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. 1.72 × 4 =
  2. 2.37 × 4 =
  3. 3.29 × 8 =
  4. 4.27 × 4 =
  5. 5.32 × 8 =
  6. 6.12 × 8 =
  7. 7.23 × 8 =
  8. 8.30 × 4 =
  9. 9.22 × 4 =
  10. 10.41 × 4 =
  11. 11.62 × 4 =
  12. 12.33 × 4 =
  13. 13.49 × 4 =
  14. 14.19 × 8 =
  15. 15.73 × 4 =
  16. 16.21 × 4 =
  17. 17.39 × 8 =
  18. 18.17 × 8 =
  19. 19.13 × 8 =
  20. 20.68 × 4 =
  21. 21.33 × 8 =
  22. 22.38 × 4 =
  23. 23.40 × 8 =
  24. 24.22 × 8 =
  25. 25.15 × 8 =
  26. 26.21 × 8 =
  27. 27.42 × 4 =
  28. 28.26 × 8 =
  29. 29.28 × 4 =
  30. 30.34 × 8 =
  31. 31.16 × 8 =
  32. 32.35 × 8 =
  33. 33.66 × 4 =
  34. 34.43 × 4 =
  35. 35.51 × 4 =
  36. 36.35 × 4 =
  37. 37.38 × 8 =
  38. 38.17 × 4 =
  39. 39.32 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 288
  2. 148
  3. 232
  4. 108
  5. 256
  6. 96
  7. 184
  8. 120
  9. 88
  10. 164
  11. 248
  12. 132
  13. 196
  14. 152
  15. 292
  16. 84
  17. 312
  18. 136
  19. 104
  20. 272
  21. 264
  22. 152
  23. 320
  24. 176
  25. 120
  26. 168
  27. 168
  28. 208
  29. 112
  30. 272
  31. 128
  32. 280
  33. 264
  34. 172
  35. 204
  36. 140
  37. 304
  38. 68
  39. 128
  40. 184

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