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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 256 · 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. 1.75 × 4 =
  2. 2.21 × 4 =
  3. 3.25 × 4 =
  4. 4.31 × 4 =
  5. 5.27 × 4 =
  6. 6.73 × 4 =
  7. 7.17 × 8 =
  8. 8.14 × 4 =
  9. 9.37 × 8 =
  10. 10.29 × 8 =
  11. 11.68 × 4 =
  12. 12.33 × 8 =
  13. 13.36 × 8 =
  14. 14.16 × 8 =
  15. 15.13 × 8 =
  16. 16.41 × 4 =
  17. 17.46 × 4 =
  18. 18.19 × 8 =
  19. 19.39 × 4 =
  20. 20.22 × 4 =
  21. 21.20 × 8 =
  22. 22.23 × 4 =
  23. 23.13 × 4 =
  24. 24.67 × 4 =
  25. 25.25 × 8 =
  26. 26.24 × 8 =
  27. 27.74 × 4 =
  28. 28.19 × 4 =
  29. 29.36 × 4 =
  30. 30.38 × 8 =
  31. 31.72 × 4 =
  32. 32.22 × 8 =
  33. 33.18 × 8 =
  34. 34.30 × 8 =
  35. 35.52 × 4 =
  36. 36.35 × 8 =
  37. 37.59 × 4 =
  38. 38.26 × 8 =
  39. 39.71 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 300
  2. 84
  3. 100
  4. 124
  5. 108
  6. 292
  7. 136
  8. 56
  9. 296
  10. 232
  11. 272
  12. 264
  13. 288
  14. 128
  15. 104
  16. 164
  17. 184
  18. 152
  19. 156
  20. 88
  21. 160
  22. 92
  23. 52
  24. 268
  25. 200
  26. 192
  27. 296
  28. 76
  29. 144
  30. 304
  31. 288
  32. 176
  33. 144
  34. 240
  35. 208
  36. 280
  37. 236
  38. 208
  39. 284
  40. 200

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