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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 85 · 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. 1.31 × 8 =
  2. 2.72 × 4 =
  3. 3.56 × 4 =
  4. 4.28 × 4 =
  5. 5.22 × 8 =
  6. 6.29 × 4 =
  7. 7.19 × 4 =
  8. 8.33 × 4 =
  9. 9.54 × 4 =
  10. 10.60 × 4 =
  11. 11.21 × 8 =
  12. 12.37 × 8 =
  13. 13.66 × 4 =
  14. 14.38 × 8 =
  15. 15.15 × 8 =
  16. 16.62 × 4 =
  17. 17.18 × 8 =
  18. 18.13 × 4 =
  19. 19.21 × 4 =
  20. 20.35 × 8 =
  21. 21.27 × 8 =
  22. 22.14 × 4 =
  23. 23.22 × 4 =
  24. 24.36 × 8 =
  25. 25.12 × 8 =
  26. 26.38 × 4 =
  27. 27.53 × 4 =
  28. 28.16 × 8 =
  29. 29.32 × 8 =
  30. 30.29 × 8 =
  31. 31.39 × 8 =
  32. 32.58 × 4 =
  33. 33.23 × 4 =
  34. 34.24 × 8 =
  35. 35.74 × 4 =
  36. 36.48 × 4 =
  37. 37.34 × 8 =
  38. 38.12 × 4 =
  39. 39.40 × 8 =
  40. 40.57 × 4 =

Answer key

  1. 248
  2. 288
  3. 224
  4. 112
  5. 176
  6. 116
  7. 76
  8. 132
  9. 216
  10. 240
  11. 168
  12. 296
  13. 264
  14. 304
  15. 120
  16. 248
  17. 144
  18. 52
  19. 84
  20. 280
  21. 216
  22. 56
  23. 88
  24. 288
  25. 96
  26. 152
  27. 212
  28. 128
  29. 256
  30. 232
  31. 312
  32. 232
  33. 92
  34. 192
  35. 296
  36. 192
  37. 272
  38. 48
  39. 320
  40. 228

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