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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 187 · 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. 1.61 × 4 =
  2. 2.45 × 4 =
  3. 3.63 × 4 =
  4. 4.26 × 8 =
  5. 5.21 × 4 =
  6. 6.25 × 8 =
  7. 7.42 × 4 =
  8. 8.34 × 4 =
  9. 9.31 × 4 =
  10. 10.50 × 4 =
  11. 11.15 × 8 =
  12. 12.28 × 8 =
  13. 13.44 × 4 =
  14. 14.31 × 8 =
  15. 15.55 × 4 =
  16. 16.71 × 4 =
  17. 17.66 × 4 =
  18. 18.51 × 4 =
  19. 19.18 × 8 =
  20. 20.24 × 4 =
  21. 21.13 × 4 =
  22. 22.26 × 4 =
  23. 23.12 × 8 =
  24. 24.33 × 4 =
  25. 25.27 × 4 =
  26. 26.19 × 4 =
  27. 27.29 × 8 =
  28. 28.14 × 8 =
  29. 29.35 × 8 =
  30. 30.70 × 4 =
  31. 31.29 × 4 =
  32. 32.36 × 4 =
  33. 33.34 × 8 =
  34. 34.47 × 4 =
  35. 35.24 × 8 =
  36. 36.20 × 4 =
  37. 37.58 × 4 =
  38. 38.22 × 4 =
  39. 39.19 × 8 =
  40. 40.16 × 8 =

Answer key

  1. 244
  2. 180
  3. 252
  4. 208
  5. 84
  6. 200
  7. 168
  8. 136
  9. 124
  10. 200
  11. 120
  12. 224
  13. 176
  14. 248
  15. 220
  16. 284
  17. 264
  18. 204
  19. 144
  20. 96
  21. 52
  22. 104
  23. 96
  24. 132
  25. 108
  26. 76
  27. 232
  28. 112
  29. 280
  30. 280
  31. 116
  32. 144
  33. 272
  34. 188
  35. 192
  36. 80
  37. 232
  38. 88
  39. 152
  40. 128

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