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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 677 · 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. 1.61 × 4 =
  2. 2.12 × 4 =
  3. 3.24 × 8 =
  4. 4.67 × 4 =
  5. 5.35 × 4 =
  6. 6.18 × 8 =
  7. 7.51 × 4 =
  8. 8.47 × 4 =
  9. 9.15 × 8 =
  10. 10.12 × 8 =
  11. 11.33 × 4 =
  12. 12.31 × 8 =
  13. 13.25 × 8 =
  14. 14.37 × 4 =
  15. 15.75 × 4 =
  16. 16.24 × 4 =
  17. 17.27 × 4 =
  18. 18.28 × 8 =
  19. 19.32 × 8 =
  20. 20.19 × 8 =
  21. 21.34 × 4 =
  22. 22.26 × 8 =
  23. 23.56 × 4 =
  24. 24.40 × 8 =
  25. 25.53 × 4 =
  26. 26.21 × 4 =
  27. 27.14 × 8 =
  28. 28.14 × 4 =
  29. 29.37 × 8 =
  30. 30.34 × 8 =
  31. 31.13 × 8 =
  32. 32.27 × 8 =
  33. 33.39 × 8 =
  34. 34.20 × 4 =
  35. 35.48 × 4 =
  36. 36.41 × 4 =
  37. 37.62 × 4 =
  38. 38.38 × 8 =
  39. 39.30 × 4 =
  40. 40.31 × 4 =

Answer key

  1. 244
  2. 48
  3. 192
  4. 268
  5. 140
  6. 144
  7. 204
  8. 188
  9. 120
  10. 96
  11. 132
  12. 248
  13. 200
  14. 148
  15. 300
  16. 96
  17. 108
  18. 224
  19. 256
  20. 152
  21. 136
  22. 208
  23. 224
  24. 320
  25. 212
  26. 84
  27. 112
  28. 56
  29. 296
  30. 272
  31. 104
  32. 216
  33. 312
  34. 80
  35. 192
  36. 164
  37. 248
  38. 304
  39. 120
  40. 124

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