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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 872 · 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. 1.33 × 4 =
  2. 2.33 × 8 =
  3. 3.58 × 4 =
  4. 4.18 × 8 =
  5. 5.47 × 4 =
  6. 6.39 × 4 =
  7. 7.15 × 8 =
  8. 8.66 × 4 =
  9. 9.40 × 8 =
  10. 10.30 × 8 =
  11. 11.34 × 8 =
  12. 12.19 × 8 =
  13. 13.27 × 8 =
  14. 14.62 × 4 =
  15. 15.39 × 8 =
  16. 16.25 × 8 =
  17. 17.29 × 8 =
  18. 18.20 × 8 =
  19. 19.22 × 8 =
  20. 20.20 × 4 =
  21. 21.69 × 4 =
  22. 22.16 × 4 =
  23. 23.14 × 8 =
  24. 24.36 × 8 =
  25. 25.41 × 4 =
  26. 26.21 × 4 =
  27. 27.37 × 4 =
  28. 28.26 × 8 =
  29. 29.34 × 4 =
  30. 30.13 × 8 =
  31. 31.15 × 4 =
  32. 32.48 × 4 =
  33. 33.23 × 4 =
  34. 34.52 × 4 =
  35. 35.72 × 4 =
  36. 36.74 × 4 =
  37. 37.30 × 4 =
  38. 38.14 × 4 =
  39. 39.32 × 8 =
  40. 40.24 × 4 =

Answer key

  1. 132
  2. 264
  3. 232
  4. 144
  5. 188
  6. 156
  7. 120
  8. 264
  9. 320
  10. 240
  11. 272
  12. 152
  13. 216
  14. 248
  15. 312
  16. 200
  17. 232
  18. 160
  19. 176
  20. 80
  21. 276
  22. 64
  23. 112
  24. 288
  25. 164
  26. 84
  27. 148
  28. 208
  29. 136
  30. 104
  31. 60
  32. 192
  33. 92
  34. 208
  35. 288
  36. 296
  37. 120
  38. 56
  39. 256
  40. 96

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