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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 367 · 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. 1.70 × 4 =
  2. 2.41 × 4 =
  3. 3.31 × 8 =
  4. 4.26 × 8 =
  5. 5.21 × 8 =
  6. 6.37 × 8 =
  7. 7.72 × 4 =
  8. 8.71 × 4 =
  9. 9.29 × 8 =
  10. 10.36 × 8 =
  11. 11.17 × 4 =
  12. 12.35 × 8 =
  13. 13.22 × 4 =
  14. 14.14 × 4 =
  15. 15.40 × 8 =
  16. 16.16 × 8 =
  17. 17.21 × 4 =
  18. 18.33 × 4 =
  19. 19.39 × 8 =
  20. 20.30 × 4 =
  21. 21.23 × 4 =
  22. 22.19 × 4 =
  23. 23.13 × 4 =
  24. 24.25 × 4 =
  25. 25.27 × 8 =
  26. 26.19 × 8 =
  27. 27.20 × 8 =
  28. 28.28 × 4 =
  29. 29.18 × 8 =
  30. 30.64 × 4 =
  31. 31.22 × 8 =
  32. 32.67 × 4 =
  33. 33.35 × 4 =
  34. 34.12 × 8 =
  35. 35.59 × 4 =
  36. 36.24 × 4 =
  37. 37.38 × 4 =
  38. 38.14 × 8 =
  39. 39.13 × 8 =
  40. 40.48 × 4 =

Answer key

  1. 280
  2. 164
  3. 248
  4. 208
  5. 168
  6. 296
  7. 288
  8. 284
  9. 232
  10. 288
  11. 68
  12. 280
  13. 88
  14. 56
  15. 320
  16. 128
  17. 84
  18. 132
  19. 312
  20. 120
  21. 92
  22. 76
  23. 52
  24. 100
  25. 216
  26. 152
  27. 160
  28. 112
  29. 144
  30. 256
  31. 176
  32. 268
  33. 140
  34. 96
  35. 236
  36. 96
  37. 152
  38. 112
  39. 104
  40. 192

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