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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 618 · 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. 1.65 × 4 =
  2. 2.31 × 4 =
  3. 3.21 × 4 =
  4. 4.22 × 4 =
  5. 5.23 × 8 =
  6. 6.25 × 8 =
  7. 7.16 × 8 =
  8. 8.27 × 4 =
  9. 9.13 × 8 =
  10. 10.74 × 4 =
  11. 11.75 × 4 =
  12. 12.21 × 8 =
  13. 13.29 × 4 =
  14. 14.69 × 4 =
  15. 15.34 × 8 =
  16. 16.40 × 8 =
  17. 17.12 × 8 =
  18. 18.39 × 8 =
  19. 19.18 × 8 =
  20. 20.14 × 8 =
  21. 21.25 × 4 =
  22. 22.26 × 8 =
  23. 23.66 × 4 =
  24. 24.33 × 8 =
  25. 25.37 × 8 =
  26. 26.62 × 4 =
  27. 27.52 × 4 =
  28. 28.27 × 8 =
  29. 29.46 × 4 =
  30. 30.44 × 4 =
  31. 31.18 × 4 =
  32. 32.35 × 8 =
  33. 33.45 × 4 =
  34. 34.47 × 4 =
  35. 35.37 × 4 =
  36. 36.16 × 4 =
  37. 37.31 × 8 =
  38. 38.34 × 4 =
  39. 39.38 × 8 =
  40. 40.42 × 4 =

Answer key

  1. 260
  2. 124
  3. 84
  4. 88
  5. 184
  6. 200
  7. 128
  8. 108
  9. 104
  10. 296
  11. 300
  12. 168
  13. 116
  14. 276
  15. 272
  16. 320
  17. 96
  18. 312
  19. 144
  20. 112
  21. 100
  22. 208
  23. 264
  24. 264
  25. 296
  26. 248
  27. 208
  28. 216
  29. 184
  30. 176
  31. 72
  32. 280
  33. 180
  34. 188
  35. 148
  36. 64
  37. 248
  38. 136
  39. 304
  40. 168

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