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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 895 · 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. 1.20 × 8 =
  2. 2.23 × 8 =
  3. 3.31 × 8 =
  4. 4.35 × 8 =
  5. 5.21 × 4 =
  6. 6.72 × 4 =
  7. 7.36 × 8 =
  8. 8.28 × 4 =
  9. 9.55 × 4 =
  10. 10.23 × 4 =
  11. 11.16 × 8 =
  12. 12.26 × 8 =
  13. 13.67 × 4 =
  14. 14.25 × 8 =
  15. 15.34 × 4 =
  16. 16.15 × 8 =
  17. 17.62 × 4 =
  18. 18.27 × 4 =
  19. 19.61 × 4 =
  20. 20.33 × 8 =
  21. 21.18 × 4 =
  22. 22.16 × 4 =
  23. 23.29 × 4 =
  24. 24.14 × 8 =
  25. 25.13 × 8 =
  26. 26.34 × 8 =
  27. 27.66 × 4 =
  28. 28.37 × 8 =
  29. 29.39 × 4 =
  30. 30.40 × 8 =
  31. 31.17 × 8 =
  32. 32.46 × 4 =
  33. 33.12 × 8 =
  34. 34.14 × 4 =
  35. 35.31 × 4 =
  36. 36.24 × 8 =
  37. 37.37 × 4 =
  38. 38.30 × 8 =
  39. 39.60 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 160
  2. 184
  3. 248
  4. 280
  5. 84
  6. 288
  7. 288
  8. 112
  9. 220
  10. 92
  11. 128
  12. 208
  13. 268
  14. 200
  15. 136
  16. 120
  17. 248
  18. 108
  19. 244
  20. 264
  21. 72
  22. 64
  23. 116
  24. 112
  25. 104
  26. 272
  27. 264
  28. 296
  29. 156
  30. 320
  31. 136
  32. 184
  33. 96
  34. 56
  35. 124
  36. 192
  37. 148
  38. 240
  39. 240
  40. 292

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