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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 953 · 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. 1.39 × 8 =
  2. 2.60 × 4 =
  3. 3.20 × 4 =
  4. 4.29 × 8 =
  5. 5.15 × 8 =
  6. 6.28 × 8 =
  7. 7.70 × 4 =
  8. 8.19 × 4 =
  9. 9.25 × 8 =
  10. 10.13 × 8 =
  11. 11.19 × 8 =
  12. 12.14 × 4 =
  13. 13.23 × 8 =
  14. 14.31 × 8 =
  15. 15.74 × 4 =
  16. 16.48 × 4 =
  17. 17.27 × 4 =
  18. 18.24 × 4 =
  19. 19.16 × 8 =
  20. 20.41 × 4 =
  21. 21.25 × 4 =
  22. 22.34 × 8 =
  23. 23.32 × 8 =
  24. 24.17 × 8 =
  25. 25.14 × 8 =
  26. 26.52 × 4 =
  27. 27.33 × 4 =
  28. 28.42 × 4 =
  29. 29.12 × 8 =
  30. 30.51 × 4 =
  31. 31.33 × 8 =
  32. 32.37 × 8 =
  33. 33.65 × 4 =
  34. 34.54 × 4 =
  35. 35.73 × 4 =
  36. 36.22 × 8 =
  37. 37.64 × 4 =
  38. 38.44 × 4 =
  39. 39.58 × 4 =
  40. 40.55 × 4 =

Answer key

  1. 312
  2. 240
  3. 80
  4. 232
  5. 120
  6. 224
  7. 280
  8. 76
  9. 200
  10. 104
  11. 152
  12. 56
  13. 184
  14. 248
  15. 296
  16. 192
  17. 108
  18. 96
  19. 128
  20. 164
  21. 100
  22. 272
  23. 256
  24. 136
  25. 112
  26. 208
  27. 132
  28. 168
  29. 96
  30. 204
  31. 264
  32. 296
  33. 260
  34. 216
  35. 292
  36. 176
  37. 256
  38. 176
  39. 232
  40. 220

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