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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 224 · 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. 1.73 × 4 =
  2. 2.74 × 4 =
  3. 3.26 × 4 =
  4. 4.31 × 8 =
  5. 5.62 × 4 =
  6. 6.24 × 8 =
  7. 7.26 × 8 =
  8. 8.33 × 4 =
  9. 9.46 × 4 =
  10. 10.24 × 4 =
  11. 11.52 × 4 =
  12. 12.14 × 8 =
  13. 13.48 × 4 =
  14. 14.54 × 4 =
  15. 15.56 × 4 =
  16. 16.23 × 8 =
  17. 17.16 × 8 =
  18. 18.36 × 4 =
  19. 19.21 × 8 =
  20. 20.22 × 8 =
  21. 21.19 × 4 =
  22. 22.35 × 4 =
  23. 23.63 × 4 =
  24. 24.47 × 4 =
  25. 25.28 × 8 =
  26. 26.39 × 4 =
  27. 27.30 × 4 =
  28. 28.14 × 4 =
  29. 29.27 × 4 =
  30. 30.30 × 8 =
  31. 31.71 × 4 =
  32. 32.45 × 4 =
  33. 33.69 × 4 =
  34. 34.28 × 4 =
  35. 35.27 × 8 =
  36. 36.32 × 4 =
  37. 37.13 × 4 =
  38. 38.21 × 4 =
  39. 39.32 × 8 =
  40. 40.64 × 4 =

Answer key

  1. 292
  2. 296
  3. 104
  4. 248
  5. 248
  6. 192
  7. 208
  8. 132
  9. 184
  10. 96
  11. 208
  12. 112
  13. 192
  14. 216
  15. 224
  16. 184
  17. 128
  18. 144
  19. 168
  20. 176
  21. 76
  22. 140
  23. 252
  24. 188
  25. 224
  26. 156
  27. 120
  28. 56
  29. 108
  30. 240
  31. 284
  32. 180
  33. 276
  34. 112
  35. 216
  36. 128
  37. 52
  38. 84
  39. 256
  40. 256

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