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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 208 · 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. 1.18 × 8 =
  2. 2.29 × 4 =
  3. 3.21 × 4 =
  4. 4.34 × 8 =
  5. 5.37 × 8 =
  6. 6.12 × 8 =
  7. 7.20 × 8 =
  8. 8.37 × 4 =
  9. 9.64 × 4 =
  10. 10.27 × 4 =
  11. 11.23 × 8 =
  12. 12.32 × 8 =
  13. 13.17 × 4 =
  14. 14.53 × 4 =
  15. 15.42 × 4 =
  16. 16.47 × 4 =
  17. 17.19 × 8 =
  18. 18.16 × 8 =
  19. 19.29 × 8 =
  20. 20.48 × 4 =
  21. 21.31 × 4 =
  22. 22.33 × 8 =
  23. 23.13 × 8 =
  24. 24.15 × 8 =
  25. 25.35 × 8 =
  26. 26.34 × 4 =
  27. 27.15 × 4 =
  28. 28.30 × 8 =
  29. 29.39 × 4 =
  30. 30.24 × 8 =
  31. 31.26 × 4 =
  32. 32.75 × 4 =
  33. 33.51 × 4 =
  34. 34.63 × 4 =
  35. 35.50 × 4 =
  36. 36.36 × 8 =
  37. 37.46 × 4 =
  38. 38.22 × 8 =
  39. 39.62 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 144
  2. 116
  3. 84
  4. 272
  5. 296
  6. 96
  7. 160
  8. 148
  9. 256
  10. 108
  11. 184
  12. 256
  13. 68
  14. 212
  15. 168
  16. 188
  17. 152
  18. 128
  19. 232
  20. 192
  21. 124
  22. 264
  23. 104
  24. 120
  25. 280
  26. 136
  27. 60
  28. 240
  29. 156
  30. 192
  31. 104
  32. 300
  33. 204
  34. 252
  35. 200
  36. 288
  37. 184
  38. 176
  39. 248
  40. 96

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