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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 125 · 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. 1.35 × 4 =
  2. 2.22 × 8 =
  3. 3.70 × 4 =
  4. 4.66 × 4 =
  5. 5.41 × 4 =
  6. 6.17 × 8 =
  7. 7.38 × 8 =
  8. 8.24 × 8 =
  9. 9.52 × 4 =
  10. 10.25 × 4 =
  11. 11.13 × 8 =
  12. 12.63 × 4 =
  13. 13.32 × 4 =
  14. 14.53 × 4 =
  15. 15.30 × 4 =
  16. 16.28 × 4 =
  17. 17.36 × 8 =
  18. 18.32 × 8 =
  19. 19.42 × 4 =
  20. 20.16 × 8 =
  21. 21.43 × 4 =
  22. 22.19 × 8 =
  23. 23.12 × 4 =
  24. 24.40 × 4 =
  25. 25.20 × 8 =
  26. 26.27 × 4 =
  27. 27.31 × 4 =
  28. 28.27 × 8 =
  29. 29.26 × 8 =
  30. 30.18 × 4 =
  31. 31.12 × 8 =
  32. 32.44 × 4 =
  33. 33.30 × 8 =
  34. 34.26 × 4 =
  35. 35.74 × 4 =
  36. 36.21 × 8 =
  37. 37.39 × 4 =
  38. 38.62 × 4 =
  39. 39.24 × 4 =
  40. 40.29 × 4 =

Answer key

  1. 140
  2. 176
  3. 280
  4. 264
  5. 164
  6. 136
  7. 304
  8. 192
  9. 208
  10. 100
  11. 104
  12. 252
  13. 128
  14. 212
  15. 120
  16. 112
  17. 288
  18. 256
  19. 168
  20. 128
  21. 172
  22. 152
  23. 48
  24. 160
  25. 160
  26. 108
  27. 124
  28. 216
  29. 208
  30. 72
  31. 96
  32. 176
  33. 240
  34. 104
  35. 296
  36. 168
  37. 156
  38. 248
  39. 96
  40. 116

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