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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 79 · 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. 1.27 × 8 =
  2. 2.20 × 4 =
  3. 3.44 × 4 =
  4. 4.33 × 4 =
  5. 5.18 × 8 =
  6. 6.39 × 4 =
  7. 7.48 × 4 =
  8. 8.29 × 4 =
  9. 9.28 × 8 =
  10. 10.71 × 4 =
  11. 11.23 × 8 =
  12. 12.16 × 8 =
  13. 13.22 × 8 =
  14. 14.60 × 4 =
  15. 15.15 × 8 =
  16. 16.52 × 4 =
  17. 17.13 × 8 =
  18. 18.24 × 8 =
  19. 19.21 × 4 =
  20. 20.34 × 4 =
  21. 21.30 × 8 =
  22. 22.49 × 4 =
  23. 23.16 × 4 =
  24. 24.37 × 8 =
  25. 25.32 × 8 =
  26. 26.19 × 8 =
  27. 27.14 × 8 =
  28. 28.22 × 4 =
  29. 29.12 × 8 =
  30. 30.25 × 8 =
  31. 31.38 × 8 =
  32. 32.56 × 4 =
  33. 33.42 × 4 =
  34. 34.34 × 8 =
  35. 35.13 × 4 =
  36. 36.45 × 4 =
  37. 37.40 × 8 =
  38. 38.47 × 4 =
  39. 39.39 × 8 =
  40. 40.74 × 4 =

Answer key

  1. 216
  2. 80
  3. 176
  4. 132
  5. 144
  6. 156
  7. 192
  8. 116
  9. 224
  10. 284
  11. 184
  12. 128
  13. 176
  14. 240
  15. 120
  16. 208
  17. 104
  18. 192
  19. 84
  20. 136
  21. 240
  22. 196
  23. 64
  24. 296
  25. 256
  26. 152
  27. 112
  28. 88
  29. 96
  30. 200
  31. 304
  32. 224
  33. 168
  34. 272
  35. 52
  36. 180
  37. 320
  38. 188
  39. 312
  40. 296

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