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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 485 · 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. 2.49 × 4 =
  3. 3.34 × 4 =
  4. 4.71 × 4 =
  5. 5.55 × 4 =
  6. 6.19 × 4 =
  7. 7.20 × 8 =
  8. 8.25 × 8 =
  9. 9.22 × 8 =
  10. 10.51 × 4 =
  11. 11.14 × 8 =
  12. 12.39 × 4 =
  13. 13.30 × 8 =
  14. 14.35 × 8 =
  15. 15.26 × 8 =
  16. 16.41 × 4 =
  17. 17.17 × 4 =
  18. 18.72 × 4 =
  19. 19.37 × 8 =
  20. 20.61 × 4 =
  21. 21.12 × 8 =
  22. 22.27 × 4 =
  23. 23.74 × 4 =
  24. 24.33 × 4 =
  25. 25.73 × 4 =
  26. 26.38 × 4 =
  27. 27.36 × 8 =
  28. 28.70 × 4 =
  29. 29.13 × 4 =
  30. 30.24 × 8 =
  31. 31.29 × 4 =
  32. 32.15 × 8 =
  33. 33.19 × 8 =
  34. 34.12 × 4 =
  35. 35.39 × 8 =
  36. 36.27 × 8 =
  37. 37.33 × 8 =
  38. 38.37 × 4 =
  39. 39.16 × 8 =
  40. 40.21 × 8 =

Answer key

  1. 100
  2. 196
  3. 136
  4. 284
  5. 220
  6. 76
  7. 160
  8. 200
  9. 176
  10. 204
  11. 112
  12. 156
  13. 240
  14. 280
  15. 208
  16. 164
  17. 68
  18. 288
  19. 296
  20. 244
  21. 96
  22. 108
  23. 296
  24. 132
  25. 292
  26. 152
  27. 288
  28. 280
  29. 52
  30. 192
  31. 116
  32. 120
  33. 152
  34. 48
  35. 312
  36. 216
  37. 264
  38. 148
  39. 128
  40. 168

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