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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 252 · 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. 1.15 × 8 =
  2. 2.40 × 8 =
  3. 3.75 × 4 =
  4. 4.27 × 8 =
  5. 5.15 × 4 =
  6. 6.35 × 8 =
  7. 7.51 × 4 =
  8. 8.14 × 8 =
  9. 9.69 × 4 =
  10. 10.37 × 8 =
  11. 11.24 × 8 =
  12. 12.73 × 4 =
  13. 13.19 × 8 =
  14. 14.23 × 8 =
  15. 15.13 × 8 =
  16. 16.39 × 8 =
  17. 17.44 × 4 =
  18. 18.48 × 4 =
  19. 19.70 × 4 =
  20. 20.59 × 4 =
  21. 21.46 × 4 =
  22. 22.32 × 4 =
  23. 23.39 × 4 =
  24. 24.47 × 4 =
  25. 25.30 × 4 =
  26. 26.64 × 4 =
  27. 27.26 × 8 =
  28. 28.24 × 4 =
  29. 29.38 × 8 =
  30. 30.29 × 8 =
  31. 31.22 × 8 =
  32. 32.20 × 8 =
  33. 33.42 × 4 =
  34. 34.25 × 8 =
  35. 35.25 × 4 =
  36. 36.43 × 4 =
  37. 37.28 × 4 =
  38. 38.68 × 4 =
  39. 39.18 × 8 =
  40. 40.37 × 4 =

Answer key

  1. 120
  2. 320
  3. 300
  4. 216
  5. 60
  6. 280
  7. 204
  8. 112
  9. 276
  10. 296
  11. 192
  12. 292
  13. 152
  14. 184
  15. 104
  16. 312
  17. 176
  18. 192
  19. 280
  20. 236
  21. 184
  22. 128
  23. 156
  24. 188
  25. 120
  26. 256
  27. 208
  28. 96
  29. 304
  30. 232
  31. 176
  32. 160
  33. 168
  34. 200
  35. 100
  36. 172
  37. 112
  38. 272
  39. 144
  40. 148

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