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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 979 · 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. 1.75 × 4 =
  2. 2.35 × 8 =
  3. 3.19 × 4 =
  4. 4.62 × 4 =
  5. 5.30 × 4 =
  6. 6.29 × 8 =
  7. 7.44 × 4 =
  8. 8.23 × 8 =
  9. 9.39 × 4 =
  10. 10.74 × 4 =
  11. 11.33 × 8 =
  12. 12.52 × 4 =
  13. 13.32 × 8 =
  14. 14.12 × 8 =
  15. 15.26 × 8 =
  16. 16.43 × 4 =
  17. 17.68 × 4 =
  18. 18.26 × 4 =
  19. 19.15 × 8 =
  20. 20.25 × 8 =
  21. 21.50 × 4 =
  22. 22.66 × 4 =
  23. 23.16 × 4 =
  24. 24.63 × 4 =
  25. 25.24 × 8 =
  26. 26.34 × 8 =
  27. 27.17 × 4 =
  28. 28.60 × 4 =
  29. 29.41 × 4 =
  30. 30.13 × 4 =
  31. 31.16 × 8 =
  32. 32.40 × 8 =
  33. 33.20 × 8 =
  34. 34.38 × 8 =
  35. 35.36 × 4 =
  36. 36.31 × 8 =
  37. 37.18 × 8 =
  38. 38.28 × 4 =
  39. 39.31 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 300
  2. 280
  3. 76
  4. 248
  5. 120
  6. 232
  7. 176
  8. 184
  9. 156
  10. 296
  11. 264
  12. 208
  13. 256
  14. 96
  15. 208
  16. 172
  17. 272
  18. 104
  19. 120
  20. 200
  21. 200
  22. 264
  23. 64
  24. 252
  25. 192
  26. 272
  27. 68
  28. 240
  29. 164
  30. 52
  31. 128
  32. 320
  33. 160
  34. 304
  35. 144
  36. 248
  37. 144
  38. 112
  39. 124
  40. 96

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