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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 232 · 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. 1.25 × 4 =
  2. 2.29 × 4 =
  3. 3.37 × 4 =
  4. 4.53 × 4 =
  5. 5.35 × 8 =
  6. 6.44 × 4 =
  7. 7.70 × 4 =
  8. 8.61 × 4 =
  9. 9.19 × 8 =
  10. 10.39 × 8 =
  11. 11.12 × 8 =
  12. 12.68 × 4 =
  13. 13.46 × 4 =
  14. 14.34 × 8 =
  15. 15.31 × 4 =
  16. 16.15 × 4 =
  17. 17.32 × 4 =
  18. 18.25 × 8 =
  19. 19.17 × 8 =
  20. 20.31 × 8 =
  21. 21.55 × 4 =
  22. 22.40 × 8 =
  23. 23.71 × 4 =
  24. 24.13 × 4 =
  25. 25.16 × 8 =
  26. 26.24 × 8 =
  27. 27.27 × 8 =
  28. 28.27 × 4 =
  29. 29.35 × 4 =
  30. 30.20 × 4 =
  31. 31.22 × 8 =
  32. 32.18 × 8 =
  33. 33.56 × 4 =
  34. 34.38 × 8 =
  35. 35.23 × 8 =
  36. 36.26 × 4 =
  37. 37.49 × 4 =
  38. 38.50 × 4 =
  39. 39.64 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 100
  2. 116
  3. 148
  4. 212
  5. 280
  6. 176
  7. 280
  8. 244
  9. 152
  10. 312
  11. 96
  12. 272
  13. 184
  14. 272
  15. 124
  16. 60
  17. 128
  18. 200
  19. 136
  20. 248
  21. 220
  22. 320
  23. 284
  24. 52
  25. 128
  26. 192
  27. 216
  28. 108
  29. 140
  30. 80
  31. 176
  32. 144
  33. 224
  34. 304
  35. 184
  36. 104
  37. 196
  38. 200
  39. 256
  40. 104

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