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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 213 · 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. 1.37 × 8 =
  2. 2.28 × 8 =
  3. 3.13 × 8 =
  4. 4.17 × 8 =
  5. 5.14 × 8 =
  6. 6.16 × 8 =
  7. 7.32 × 8 =
  8. 8.37 × 4 =
  9. 9.19 × 8 =
  10. 10.51 × 4 =
  11. 11.15 × 8 =
  12. 12.14 × 4 =
  13. 13.12 × 8 =
  14. 14.61 × 4 =
  15. 15.34 × 8 =
  16. 16.66 × 4 =
  17. 17.38 × 8 =
  18. 18.33 × 8 =
  19. 19.30 × 8 =
  20. 20.56 × 4 =
  21. 21.40 × 8 =
  22. 22.18 × 8 =
  23. 23.22 × 8 =
  24. 24.39 × 8 =
  25. 25.68 × 4 =
  26. 26.19 × 4 =
  27. 27.34 × 4 =
  28. 28.60 × 4 =
  29. 29.29 × 8 =
  30. 30.33 × 4 =
  31. 31.15 × 4 =
  32. 32.40 × 4 =
  33. 33.32 × 4 =
  34. 34.23 × 4 =
  35. 35.26 × 8 =
  36. 36.73 × 4 =
  37. 37.20 × 8 =
  38. 38.27 × 8 =
  39. 39.28 × 4 =
  40. 40.38 × 4 =

Answer key

  1. 296
  2. 224
  3. 104
  4. 136
  5. 112
  6. 128
  7. 256
  8. 148
  9. 152
  10. 204
  11. 120
  12. 56
  13. 96
  14. 244
  15. 272
  16. 264
  17. 304
  18. 264
  19. 240
  20. 224
  21. 320
  22. 144
  23. 176
  24. 312
  25. 272
  26. 76
  27. 136
  28. 240
  29. 232
  30. 132
  31. 60
  32. 160
  33. 128
  34. 92
  35. 208
  36. 292
  37. 160
  38. 216
  39. 112
  40. 152

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