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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 668 · 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. 1.28 × 4 =
  2. 2.12 × 8 =
  3. 3.30 × 8 =
  4. 4.38 × 8 =
  5. 5.22 × 4 =
  6. 6.15 × 4 =
  7. 7.21 × 4 =
  8. 8.30 × 4 =
  9. 9.49 × 4 =
  10. 10.29 × 8 =
  11. 11.40 × 4 =
  12. 12.21 × 8 =
  13. 13.37 × 8 =
  14. 14.34 × 8 =
  15. 15.13 × 4 =
  16. 16.58 × 4 =
  17. 17.25 × 8 =
  18. 18.33 × 8 =
  19. 19.73 × 4 =
  20. 20.15 × 8 =
  21. 21.52 × 4 =
  22. 22.44 × 4 =
  23. 23.26 × 8 =
  24. 24.28 × 8 =
  25. 25.38 × 4 =
  26. 26.69 × 4 =
  27. 27.16 × 8 =
  28. 28.13 × 8 =
  29. 29.39 × 8 =
  30. 30.14 × 4 =
  31. 31.46 × 4 =
  32. 32.29 × 4 =
  33. 33.54 × 4 =
  34. 34.70 × 4 =
  35. 35.14 × 8 =
  36. 36.39 × 4 =
  37. 37.24 × 8 =
  38. 38.26 × 4 =
  39. 39.31 × 4 =
  40. 40.20 × 4 =

Answer key

  1. 112
  2. 96
  3. 240
  4. 304
  5. 88
  6. 60
  7. 84
  8. 120
  9. 196
  10. 232
  11. 160
  12. 168
  13. 296
  14. 272
  15. 52
  16. 232
  17. 200
  18. 264
  19. 292
  20. 120
  21. 208
  22. 176
  23. 208
  24. 224
  25. 152
  26. 276
  27. 128
  28. 104
  29. 312
  30. 56
  31. 184
  32. 116
  33. 216
  34. 280
  35. 112
  36. 156
  37. 192
  38. 104
  39. 124
  40. 80

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