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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 335 · 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. 1.55 × 4 =
  2. 2.28 × 4 =
  3. 3.19 × 4 =
  4. 4.40 × 8 =
  5. 5.39 × 8 =
  6. 6.23 × 8 =
  7. 7.41 × 4 =
  8. 8.19 × 8 =
  9. 9.14 × 8 =
  10. 10.36 × 8 =
  11. 11.18 × 4 =
  12. 12.30 × 8 =
  13. 13.18 × 8 =
  14. 14.38 × 8 =
  15. 15.68 × 4 =
  16. 16.22 × 8 =
  17. 17.16 × 8 =
  18. 18.36 × 4 =
  19. 19.25 × 8 =
  20. 20.23 × 4 =
  21. 21.13 × 8 =
  22. 22.20 × 4 =
  23. 23.34 × 8 =
  24. 24.17 × 8 =
  25. 25.24 × 4 =
  26. 26.26 × 4 =
  27. 27.47 × 4 =
  28. 28.74 × 4 =
  29. 29.31 × 4 =
  30. 30.33 × 4 =
  31. 31.52 × 4 =
  32. 32.44 × 4 =
  33. 33.60 × 4 =
  34. 34.66 × 4 =
  35. 35.58 × 4 =
  36. 36.62 × 4 =
  37. 37.27 × 8 =
  38. 38.21 × 4 =
  39. 39.12 × 8 =
  40. 40.15 × 8 =

Answer key

  1. 220
  2. 112
  3. 76
  4. 320
  5. 312
  6. 184
  7. 164
  8. 152
  9. 112
  10. 288
  11. 72
  12. 240
  13. 144
  14. 304
  15. 272
  16. 176
  17. 128
  18. 144
  19. 200
  20. 92
  21. 104
  22. 80
  23. 272
  24. 136
  25. 96
  26. 104
  27. 188
  28. 296
  29. 124
  30. 132
  31. 208
  32. 176
  33. 240
  34. 264
  35. 232
  36. 248
  37. 216
  38. 84
  39. 96
  40. 120

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