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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 37 · 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. 1.72 × 4 =
  2. 2.28 × 4 =
  3. 3.17 × 8 =
  4. 4.69 × 4 =
  5. 5.23 × 8 =
  6. 6.32 × 4 =
  7. 7.31 × 4 =
  8. 8.35 × 8 =
  9. 9.15 × 8 =
  10. 10.17 × 4 =
  11. 11.30 × 4 =
  12. 12.71 × 4 =
  13. 13.48 × 4 =
  14. 14.40 × 4 =
  15. 15.51 × 4 =
  16. 16.27 × 8 =
  17. 17.21 × 8 =
  18. 18.66 × 4 =
  19. 19.19 × 8 =
  20. 20.58 × 4 =
  21. 21.62 × 4 =
  22. 22.68 × 4 =
  23. 23.37 × 4 =
  24. 24.33 × 8 =
  25. 25.25 × 4 =
  26. 26.25 × 8 =
  27. 27.75 × 4 =
  28. 28.33 × 4 =
  29. 29.20 × 8 =
  30. 30.30 × 8 =
  31. 31.15 × 4 =
  32. 32.16 × 8 =
  33. 33.39 × 4 =
  34. 34.55 × 4 =
  35. 35.13 × 4 =
  36. 36.13 × 8 =
  37. 37.36 × 8 =
  38. 38.39 × 8 =
  39. 39.46 × 4 =
  40. 40.22 × 4 =

Answer key

  1. 288
  2. 112
  3. 136
  4. 276
  5. 184
  6. 128
  7. 124
  8. 280
  9. 120
  10. 68
  11. 120
  12. 284
  13. 192
  14. 160
  15. 204
  16. 216
  17. 168
  18. 264
  19. 152
  20. 232
  21. 248
  22. 272
  23. 148
  24. 264
  25. 100
  26. 200
  27. 300
  28. 132
  29. 160
  30. 240
  31. 60
  32. 128
  33. 156
  34. 220
  35. 52
  36. 104
  37. 288
  38. 312
  39. 184
  40. 88

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