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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 376 · 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. 1.41 × 4 =
  2. 2.72 × 4 =
  3. 3.12 × 8 =
  4. 4.47 × 4 =
  5. 5.32 × 4 =
  6. 6.34 × 4 =
  7. 7.26 × 4 =
  8. 8.65 × 4 =
  9. 9.33 × 4 =
  10. 10.58 × 4 =
  11. 11.18 × 8 =
  12. 12.21 × 4 =
  13. 13.14 × 4 =
  14. 14.52 × 4 =
  15. 15.16 × 4 =
  16. 16.14 × 8 =
  17. 17.35 × 8 =
  18. 18.38 × 4 =
  19. 19.56 × 4 =
  20. 20.26 × 8 =
  21. 21.27 × 4 =
  22. 22.34 × 8 =
  23. 23.71 × 4 =
  24. 24.39 × 8 =
  25. 25.62 × 4 =
  26. 26.16 × 8 =
  27. 27.69 × 4 =
  28. 28.36 × 8 =
  29. 29.33 × 8 =
  30. 30.15 × 4 =
  31. 31.23 × 4 =
  32. 32.25 × 8 =
  33. 33.29 × 4 =
  34. 34.22 × 8 =
  35. 35.23 × 8 =
  36. 36.46 × 4 =
  37. 37.37 × 8 =
  38. 38.28 × 4 =
  39. 39.22 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 164
  2. 288
  3. 96
  4. 188
  5. 128
  6. 136
  7. 104
  8. 260
  9. 132
  10. 232
  11. 144
  12. 84
  13. 56
  14. 208
  15. 64
  16. 112
  17. 280
  18. 152
  19. 224
  20. 208
  21. 108
  22. 272
  23. 284
  24. 312
  25. 248
  26. 128
  27. 276
  28. 288
  29. 264
  30. 60
  31. 92
  32. 200
  33. 116
  34. 176
  35. 184
  36. 184
  37. 296
  38. 112
  39. 88
  40. 192

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