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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 991 · 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. 1.32 × 8 =
  2. 2.24 × 4 =
  3. 3.23 × 8 =
  4. 4.12 × 8 =
  5. 5.66 × 4 =
  6. 6.67 × 4 =
  7. 7.34 × 8 =
  8. 8.34 × 4 =
  9. 9.36 × 8 =
  10. 10.36 × 4 =
  11. 11.21 × 8 =
  12. 12.20 × 4 =
  13. 13.37 × 8 =
  14. 14.18 × 8 =
  15. 15.33 × 4 =
  16. 16.35 × 8 =
  17. 17.38 × 8 =
  18. 18.17 × 4 =
  19. 19.15 × 4 =
  20. 20.27 × 4 =
  21. 21.21 × 4 =
  22. 22.51 × 4 =
  23. 23.25 × 8 =
  24. 24.20 × 8 =
  25. 25.26 × 8 =
  26. 26.28 × 8 =
  27. 27.69 × 4 =
  28. 28.13 × 8 =
  29. 29.38 × 4 =
  30. 30.33 × 8 =
  31. 31.22 × 8 =
  32. 32.65 × 4 =
  33. 33.17 × 8 =
  34. 34.59 × 4 =
  35. 35.12 × 4 =
  36. 36.52 × 4 =
  37. 37.48 × 4 =
  38. 38.62 × 4 =
  39. 39.24 × 8 =
  40. 40.56 × 4 =

Answer key

  1. 256
  2. 96
  3. 184
  4. 96
  5. 264
  6. 268
  7. 272
  8. 136
  9. 288
  10. 144
  11. 168
  12. 80
  13. 296
  14. 144
  15. 132
  16. 280
  17. 304
  18. 68
  19. 60
  20. 108
  21. 84
  22. 204
  23. 200
  24. 160
  25. 208
  26. 224
  27. 276
  28. 104
  29. 152
  30. 264
  31. 176
  32. 260
  33. 136
  34. 236
  35. 48
  36. 208
  37. 192
  38. 248
  39. 192
  40. 224

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