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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 131 · 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. 2.74 × 4 =
  3. 3.28 × 8 =
  4. 4.12 × 8 =
  5. 5.50 × 4 =
  6. 6.25 × 8 =
  7. 7.22 × 8 =
  8. 8.26 × 8 =
  9. 9.40 × 4 =
  10. 10.47 × 4 =
  11. 11.73 × 4 =
  12. 12.64 × 4 =
  13. 13.16 × 8 =
  14. 14.30 × 4 =
  15. 15.29 × 4 =
  16. 16.34 × 4 =
  17. 17.22 × 4 =
  18. 18.23 × 8 =
  19. 19.19 × 4 =
  20. 20.38 × 8 =
  21. 21.26 × 4 =
  22. 22.13 × 4 =
  23. 23.25 × 4 =
  24. 24.30 × 8 =
  25. 25.18 × 8 =
  26. 26.63 × 4 =
  27. 27.21 × 4 =
  28. 28.69 × 4 =
  29. 29.20 × 8 =
  30. 30.39 × 8 =
  31. 31.12 × 4 =
  32. 32.35 × 8 =
  33. 33.58 × 4 =
  34. 34.31 × 4 =
  35. 35.23 × 4 =
  36. 36.19 × 8 =
  37. 37.68 × 4 =
  38. 38.56 × 4 =
  39. 39.15 × 8 =
  40. 40.38 × 4 =

Answer key

  1. 280
  2. 296
  3. 224
  4. 96
  5. 200
  6. 200
  7. 176
  8. 208
  9. 160
  10. 188
  11. 292
  12. 256
  13. 128
  14. 120
  15. 116
  16. 136
  17. 88
  18. 184
  19. 76
  20. 304
  21. 104
  22. 52
  23. 100
  24. 240
  25. 144
  26. 252
  27. 84
  28. 276
  29. 160
  30. 312
  31. 48
  32. 280
  33. 232
  34. 124
  35. 92
  36. 152
  37. 272
  38. 224
  39. 120
  40. 152

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