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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 266 · 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. 1.49 × 4 =
  2. 2.18 × 8 =
  3. 3.70 × 4 =
  4. 4.14 × 8 =
  5. 5.26 × 8 =
  6. 6.71 × 4 =
  7. 7.26 × 4 =
  8. 8.30 × 4 =
  9. 9.36 × 8 =
  10. 10.38 × 8 =
  11. 11.41 × 4 =
  12. 12.24 × 8 =
  13. 13.17 × 4 =
  14. 14.33 × 8 =
  15. 15.65 × 4 =
  16. 16.54 × 4 =
  17. 17.63 × 4 =
  18. 18.43 × 4 =
  19. 19.15 × 4 =
  20. 20.60 × 4 =
  21. 21.75 × 4 =
  22. 22.33 × 4 =
  23. 23.30 × 8 =
  24. 24.39 × 8 =
  25. 25.17 × 8 =
  26. 26.19 × 4 =
  27. 27.69 × 4 =
  28. 28.25 × 8 =
  29. 29.22 × 4 =
  30. 30.21 × 8 =
  31. 31.23 × 4 =
  32. 32.48 × 4 =
  33. 33.36 × 4 =
  34. 34.16 × 4 =
  35. 35.28 × 4 =
  36. 36.31 × 8 =
  37. 37.13 × 4 =
  38. 38.50 × 4 =
  39. 39.38 × 4 =
  40. 40.12 × 4 =

Answer key

  1. 196
  2. 144
  3. 280
  4. 112
  5. 208
  6. 284
  7. 104
  8. 120
  9. 288
  10. 304
  11. 164
  12. 192
  13. 68
  14. 264
  15. 260
  16. 216
  17. 252
  18. 172
  19. 60
  20. 240
  21. 300
  22. 132
  23. 240
  24. 312
  25. 136
  26. 76
  27. 276
  28. 200
  29. 88
  30. 168
  31. 92
  32. 192
  33. 144
  34. 64
  35. 112
  36. 248
  37. 52
  38. 200
  39. 152
  40. 48

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