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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 890 · 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. 1.38 × 8 =
  2. 2.34 × 8 =
  3. 3.20 × 8 =
  4. 4.37 × 8 =
  5. 5.66 × 4 =
  6. 6.26 × 8 =
  7. 7.13 × 4 =
  8. 8.23 × 8 =
  9. 9.22 × 8 =
  10. 10.26 × 4 =
  11. 11.28 × 8 =
  12. 12.73 × 4 =
  13. 13.20 × 4 =
  14. 14.53 × 4 =
  15. 15.15 × 8 =
  16. 16.40 × 8 =
  17. 17.25 × 4 =
  18. 18.23 × 4 =
  19. 19.18 × 8 =
  20. 20.30 × 4 =
  21. 21.14 × 4 =
  22. 22.27 × 8 =
  23. 23.14 × 8 =
  24. 24.35 × 8 =
  25. 25.41 × 4 =
  26. 26.37 × 4 =
  27. 27.15 × 4 =
  28. 28.27 × 4 =
  29. 29.30 × 8 =
  30. 30.31 × 8 =
  31. 31.69 × 4 =
  32. 32.59 × 4 =
  33. 33.33 × 4 =
  34. 34.32 × 8 =
  35. 35.18 × 4 =
  36. 36.34 × 4 =
  37. 37.39 × 8 =
  38. 38.28 × 4 =
  39. 39.29 × 8 =
  40. 40.51 × 4 =

Answer key

  1. 304
  2. 272
  3. 160
  4. 296
  5. 264
  6. 208
  7. 52
  8. 184
  9. 176
  10. 104
  11. 224
  12. 292
  13. 80
  14. 212
  15. 120
  16. 320
  17. 100
  18. 92
  19. 144
  20. 120
  21. 56
  22. 216
  23. 112
  24. 280
  25. 164
  26. 148
  27. 60
  28. 108
  29. 240
  30. 248
  31. 276
  32. 236
  33. 132
  34. 256
  35. 72
  36. 136
  37. 312
  38. 112
  39. 232
  40. 204

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