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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 65 · 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. 1.22 × 8 =
  2. 2.58 × 4 =
  3. 3.28 × 4 =
  4. 4.39 × 8 =
  5. 5.30 × 8 =
  6. 6.61 × 4 =
  7. 7.36 × 8 =
  8. 8.16 × 8 =
  9. 9.17 × 8 =
  10. 10.18 × 8 =
  11. 11.20 × 4 =
  12. 12.33 × 4 =
  13. 13.28 × 8 =
  14. 14.59 × 4 =
  15. 15.34 × 8 =
  16. 16.15 × 4 =
  17. 17.62 × 4 =
  18. 18.31 × 4 =
  19. 19.29 × 4 =
  20. 20.47 × 4 =
  21. 21.29 × 8 =
  22. 22.31 × 8 =
  23. 23.13 × 8 =
  24. 24.23 × 4 =
  25. 25.18 × 4 =
  26. 26.40 × 8 =
  27. 27.66 × 4 =
  28. 28.26 × 4 =
  29. 29.35 × 8 =
  30. 30.37 × 8 =
  31. 31.12 × 8 =
  32. 32.32 × 8 =
  33. 33.32 × 4 =
  34. 34.15 × 8 =
  35. 35.49 × 4 =
  36. 36.13 × 4 =
  37. 37.24 × 8 =
  38. 38.73 × 4 =
  39. 39.38 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 176
  2. 232
  3. 112
  4. 312
  5. 240
  6. 244
  7. 288
  8. 128
  9. 136
  10. 144
  11. 80
  12. 132
  13. 224
  14. 236
  15. 272
  16. 60
  17. 248
  18. 124
  19. 116
  20. 188
  21. 232
  22. 248
  23. 104
  24. 92
  25. 72
  26. 320
  27. 264
  28. 104
  29. 280
  30. 296
  31. 96
  32. 256
  33. 128
  34. 120
  35. 196
  36. 52
  37. 192
  38. 292
  39. 304
  40. 112

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