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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 343 · 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. 1.14 × 4 =
  2. 2.35 × 8 =
  3. 3.19 × 8 =
  4. 4.33 × 8 =
  5. 5.69 × 4 =
  6. 6.71 × 4 =
  7. 7.13 × 8 =
  8. 8.28 × 8 =
  9. 9.14 × 8 =
  10. 10.44 × 4 =
  11. 11.22 × 8 =
  12. 12.39 × 4 =
  13. 13.17 × 4 =
  14. 14.20 × 4 =
  15. 15.62 × 4 =
  16. 16.32 × 8 =
  17. 17.36 × 8 =
  18. 18.52 × 4 =
  19. 19.17 × 8 =
  20. 20.41 × 4 =
  21. 21.24 × 8 =
  22. 22.39 × 8 =
  23. 23.73 × 4 =
  24. 24.23 × 8 =
  25. 25.12 × 4 =
  26. 26.30 × 4 =
  27. 27.12 × 8 =
  28. 28.74 × 4 =
  29. 29.37 × 8 =
  30. 30.15 × 8 =
  31. 31.27 × 4 =
  32. 32.23 × 4 =
  33. 33.30 × 8 =
  34. 34.42 × 4 =
  35. 35.66 × 4 =
  36. 36.31 × 8 =
  37. 37.18 × 8 =
  38. 38.49 × 4 =
  39. 39.64 × 4 =
  40. 40.75 × 4 =

Answer key

  1. 56
  2. 280
  3. 152
  4. 264
  5. 276
  6. 284
  7. 104
  8. 224
  9. 112
  10. 176
  11. 176
  12. 156
  13. 68
  14. 80
  15. 248
  16. 256
  17. 288
  18. 208
  19. 136
  20. 164
  21. 192
  22. 312
  23. 292
  24. 184
  25. 48
  26. 120
  27. 96
  28. 296
  29. 296
  30. 120
  31. 108
  32. 92
  33. 240
  34. 168
  35. 264
  36. 248
  37. 144
  38. 196
  39. 256
  40. 300

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