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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 141 · 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. 1.17 × 8 =
  2. 2.72 × 4 =
  3. 3.63 × 4 =
  4. 4.16 × 4 =
  5. 5.29 × 8 =
  6. 6.14 × 4 =
  7. 7.32 × 4 =
  8. 8.43 × 4 =
  9. 9.26 × 8 =
  10. 10.48 × 4 =
  11. 11.13 × 4 =
  12. 12.64 × 4 =
  13. 13.69 × 4 =
  14. 14.59 × 4 =
  15. 15.39 × 4 =
  16. 16.32 × 8 =
  17. 17.24 × 4 =
  18. 18.70 × 4 =
  19. 19.35 × 8 =
  20. 20.16 × 8 =
  21. 21.51 × 4 =
  22. 22.28 × 4 =
  23. 23.36 × 4 =
  24. 24.12 × 8 =
  25. 25.22 × 8 =
  26. 26.29 × 4 =
  27. 27.26 × 4 =
  28. 28.52 × 4 =
  29. 29.34 × 8 =
  30. 30.24 × 8 =
  31. 31.46 × 4 =
  32. 32.36 × 8 =
  33. 33.55 × 4 =
  34. 34.17 × 4 =
  35. 35.19 × 8 =
  36. 36.22 × 4 =
  37. 37.15 × 8 =
  38. 38.13 × 8 =
  39. 39.31 × 8 =
  40. 40.39 × 8 =

Answer key

  1. 136
  2. 288
  3. 252
  4. 64
  5. 232
  6. 56
  7. 128
  8. 172
  9. 208
  10. 192
  11. 52
  12. 256
  13. 276
  14. 236
  15. 156
  16. 256
  17. 96
  18. 280
  19. 280
  20. 128
  21. 204
  22. 112
  23. 144
  24. 96
  25. 176
  26. 116
  27. 104
  28. 208
  29. 272
  30. 192
  31. 184
  32. 288
  33. 220
  34. 68
  35. 152
  36. 88
  37. 120
  38. 104
  39. 248
  40. 312

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