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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 950 · 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 × 4 =
  2. 2.25 × 4 =
  3. 3.42 × 4 =
  4. 4.29 × 4 =
  5. 5.14 × 8 =
  6. 6.24 × 4 =
  7. 7.28 × 8 =
  8. 8.62 × 4 =
  9. 9.23 × 8 =
  10. 10.22 × 4 =
  11. 11.30 × 8 =
  12. 12.47 × 4 =
  13. 13.12 × 8 =
  14. 14.32 × 8 =
  15. 15.37 × 8 =
  16. 16.40 × 8 =
  17. 17.65 × 4 =
  18. 18.64 × 4 =
  19. 19.29 × 8 =
  20. 20.39 × 8 =
  21. 21.13 × 8 =
  22. 22.21 × 8 =
  23. 23.25 × 8 =
  24. 24.35 × 8 =
  25. 25.22 × 8 =
  26. 26.50 × 4 =
  27. 27.61 × 4 =
  28. 28.41 × 4 =
  29. 29.24 × 8 =
  30. 30.31 × 8 =
  31. 31.33 × 4 =
  32. 32.27 × 4 =
  33. 33.17 × 8 =
  34. 34.30 × 4 =
  35. 35.19 × 8 =
  36. 36.16 × 8 =
  37. 37.69 × 4 =
  38. 38.48 × 4 =
  39. 39.72 × 4 =
  40. 40.68 × 4 =

Answer key

  1. 152
  2. 100
  3. 168
  4. 116
  5. 112
  6. 96
  7. 224
  8. 248
  9. 184
  10. 88
  11. 240
  12. 188
  13. 96
  14. 256
  15. 296
  16. 320
  17. 260
  18. 256
  19. 232
  20. 312
  21. 104
  22. 168
  23. 200
  24. 280
  25. 176
  26. 200
  27. 244
  28. 164
  29. 192
  30. 248
  31. 132
  32. 108
  33. 136
  34. 120
  35. 152
  36. 128
  37. 276
  38. 192
  39. 288
  40. 272

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