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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 871 · 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. 1.16 × 4 =
  2. 2.19 × 8 =
  3. 3.39 × 8 =
  4. 4.72 × 4 =
  5. 5.15 × 4 =
  6. 6.21 × 8 =
  7. 7.41 × 4 =
  8. 8.22 × 8 =
  9. 9.27 × 8 =
  10. 10.64 × 4 =
  11. 11.62 × 4 =
  12. 12.37 × 8 =
  13. 13.30 × 8 =
  14. 14.36 × 8 =
  15. 15.75 × 4 =
  16. 16.35 × 4 =
  17. 17.32 × 8 =
  18. 18.33 × 8 =
  19. 19.28 × 8 =
  20. 20.13 × 8 =
  21. 21.56 × 4 =
  22. 22.26 × 8 =
  23. 23.20 × 4 =
  24. 24.33 × 4 =
  25. 25.29 × 8 =
  26. 26.23 × 8 =
  27. 27.29 × 4 =
  28. 28.34 × 8 =
  29. 29.49 × 4 =
  30. 30.36 × 4 =
  31. 31.61 × 4 =
  32. 32.20 × 8 =
  33. 33.18 × 8 =
  34. 34.34 × 4 =
  35. 35.15 × 8 =
  36. 36.24 × 8 =
  37. 37.13 × 4 =
  38. 38.69 × 4 =
  39. 39.28 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 64
  2. 152
  3. 312
  4. 288
  5. 60
  6. 168
  7. 164
  8. 176
  9. 216
  10. 256
  11. 248
  12. 296
  13. 240
  14. 288
  15. 300
  16. 140
  17. 256
  18. 264
  19. 224
  20. 104
  21. 224
  22. 208
  23. 80
  24. 132
  25. 232
  26. 184
  27. 116
  28. 272
  29. 196
  30. 144
  31. 244
  32. 160
  33. 144
  34. 136
  35. 120
  36. 192
  37. 52
  38. 276
  39. 112
  40. 136

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