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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 879 · 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. 1.49 × 4 =
  2. 2.64 × 4 =
  3. 3.50 × 4 =
  4. 4.31 × 4 =
  5. 5.16 × 8 =
  6. 6.30 × 4 =
  7. 7.29 × 8 =
  8. 8.33 × 8 =
  9. 9.42 × 4 =
  10. 10.32 × 8 =
  11. 11.22 × 8 =
  12. 12.18 × 8 =
  13. 13.54 × 4 =
  14. 14.19 × 8 =
  15. 15.31 × 8 =
  16. 16.24 × 8 =
  17. 17.17 × 8 =
  18. 18.36 × 4 =
  19. 19.25 × 8 =
  20. 20.13 × 4 =
  21. 21.45 × 4 =
  22. 22.67 × 4 =
  23. 23.75 × 4 =
  24. 24.70 × 4 =
  25. 25.13 × 8 =
  26. 26.28 × 4 =
  27. 27.40 × 4 =
  28. 28.20 × 8 =
  29. 29.62 × 4 =
  30. 30.12 × 8 =
  31. 31.21 × 4 =
  32. 32.71 × 4 =
  33. 33.12 × 4 =
  34. 34.37 × 8 =
  35. 35.39 × 4 =
  36. 36.22 × 4 =
  37. 37.14 × 4 =
  38. 38.52 × 4 =
  39. 39.38 × 8 =
  40. 40.35 × 4 =

Answer key

  1. 196
  2. 256
  3. 200
  4. 124
  5. 128
  6. 120
  7. 232
  8. 264
  9. 168
  10. 256
  11. 176
  12. 144
  13. 216
  14. 152
  15. 248
  16. 192
  17. 136
  18. 144
  19. 200
  20. 52
  21. 180
  22. 268
  23. 300
  24. 280
  25. 104
  26. 112
  27. 160
  28. 160
  29. 248
  30. 96
  31. 84
  32. 284
  33. 48
  34. 296
  35. 156
  36. 88
  37. 56
  38. 208
  39. 304
  40. 140

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