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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 902 · 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. 1.35 × 4 =
  2. 2.21 × 4 =
  3. 3.67 × 4 =
  4. 4.40 × 8 =
  5. 5.34 × 4 =
  6. 6.31 × 8 =
  7. 7.22 × 8 =
  8. 8.36 × 8 =
  9. 9.60 × 4 =
  10. 10.42 × 4 =
  11. 11.37 × 8 =
  12. 12.73 × 4 =
  13. 13.20 × 8 =
  14. 14.53 × 4 =
  15. 15.27 × 4 =
  16. 16.14 × 4 =
  17. 17.24 × 8 =
  18. 18.69 × 4 =
  19. 19.16 × 8 =
  20. 20.17 × 8 =
  21. 21.29 × 8 =
  22. 22.38 × 4 =
  23. 23.12 × 8 =
  24. 24.44 × 4 =
  25. 25.20 × 4 =
  26. 26.26 × 8 =
  27. 27.14 × 8 =
  28. 28.74 × 4 =
  29. 29.48 × 4 =
  30. 30.52 × 4 =
  31. 31.18 × 8 =
  32. 32.39 × 8 =
  33. 33.19 × 4 =
  34. 34.19 × 8 =
  35. 35.54 × 4 =
  36. 36.13 × 8 =
  37. 37.23 × 8 =
  38. 38.27 × 8 =
  39. 39.37 × 4 =
  40. 40.36 × 4 =

Answer key

  1. 140
  2. 84
  3. 268
  4. 320
  5. 136
  6. 248
  7. 176
  8. 288
  9. 240
  10. 168
  11. 296
  12. 292
  13. 160
  14. 212
  15. 108
  16. 56
  17. 192
  18. 276
  19. 128
  20. 136
  21. 232
  22. 152
  23. 96
  24. 176
  25. 80
  26. 208
  27. 112
  28. 296
  29. 192
  30. 208
  31. 144
  32. 312
  33. 76
  34. 152
  35. 216
  36. 104
  37. 184
  38. 216
  39. 148
  40. 144

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