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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 778 · 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. 1.30 × 8 =
  2. 2.37 × 8 =
  3. 3.21 × 8 =
  4. 4.45 × 4 =
  5. 5.18 × 8 =
  6. 6.38 × 8 =
  7. 7.25 × 8 =
  8. 8.30 × 4 =
  9. 9.54 × 4 =
  10. 10.14 × 8 =
  11. 11.14 × 4 =
  12. 12.13 × 4 =
  13. 13.41 × 4 =
  14. 14.36 × 8 =
  15. 15.39 × 4 =
  16. 16.25 × 4 =
  17. 17.16 × 8 =
  18. 18.29 × 4 =
  19. 19.35 × 4 =
  20. 20.26 × 8 =
  21. 21.17 × 4 =
  22. 22.40 × 8 =
  23. 23.31 × 4 =
  24. 24.19 × 4 =
  25. 25.70 × 4 =
  26. 26.66 × 4 =
  27. 27.63 × 4 =
  28. 28.73 × 4 =
  29. 29.68 × 4 =
  30. 30.24 × 8 =
  31. 31.29 × 8 =
  32. 32.46 × 4 =
  33. 33.17 × 8 =
  34. 34.27 × 4 =
  35. 35.16 × 4 =
  36. 36.34 × 8 =
  37. 37.19 × 8 =
  38. 38.32 × 8 =
  39. 39.28 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 240
  2. 296
  3. 168
  4. 180
  5. 144
  6. 304
  7. 200
  8. 120
  9. 216
  10. 112
  11. 56
  12. 52
  13. 164
  14. 288
  15. 156
  16. 100
  17. 128
  18. 116
  19. 140
  20. 208
  21. 68
  22. 320
  23. 124
  24. 76
  25. 280
  26. 264
  27. 252
  28. 292
  29. 272
  30. 192
  31. 232
  32. 184
  33. 136
  34. 108
  35. 64
  36. 272
  37. 152
  38. 256
  39. 112
  40. 280

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