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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 691 · 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. 1.27 × 4 =
  2. 2.13 × 8 =
  3. 3.48 × 4 =
  4. 4.19 × 8 =
  5. 5.33 × 8 =
  6. 6.61 × 4 =
  7. 7.39 × 8 =
  8. 8.63 × 4 =
  9. 9.70 × 4 =
  10. 10.66 × 4 =
  11. 11.40 × 8 =
  12. 12.22 × 8 =
  13. 13.37 × 8 =
  14. 14.18 × 8 =
  15. 15.25 × 4 =
  16. 16.14 × 8 =
  17. 17.47 × 4 =
  18. 18.33 × 4 =
  19. 19.16 × 4 =
  20. 20.14 × 4 =
  21. 21.28 × 4 =
  22. 22.16 × 8 =
  23. 23.72 × 4 =
  24. 24.71 × 4 =
  25. 25.64 × 4 =
  26. 26.36 × 8 =
  27. 27.15 × 8 =
  28. 28.37 × 4 =
  29. 29.29 × 8 =
  30. 30.41 × 4 =
  31. 31.31 × 8 =
  32. 32.65 × 4 =
  33. 33.18 × 4 =
  34. 34.21 × 8 =
  35. 35.23 × 4 =
  36. 36.32 × 8 =
  37. 37.32 × 4 =
  38. 38.38 × 4 =
  39. 39.23 × 8 =
  40. 40.60 × 4 =

Answer key

  1. 108
  2. 104
  3. 192
  4. 152
  5. 264
  6. 244
  7. 312
  8. 252
  9. 280
  10. 264
  11. 320
  12. 176
  13. 296
  14. 144
  15. 100
  16. 112
  17. 188
  18. 132
  19. 64
  20. 56
  21. 112
  22. 128
  23. 288
  24. 284
  25. 256
  26. 288
  27. 120
  28. 148
  29. 232
  30. 164
  31. 248
  32. 260
  33. 72
  34. 168
  35. 92
  36. 256
  37. 128
  38. 152
  39. 184
  40. 240

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