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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 103 · 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. 1.12 × 8 =
  2. 2.13 × 8 =
  3. 3.69 × 4 =
  4. 4.18 × 4 =
  5. 5.17 × 8 =
  6. 6.44 × 4 =
  7. 7.46 × 4 =
  8. 8.32 × 8 =
  9. 9.35 × 4 =
  10. 10.71 × 4 =
  11. 11.33 × 8 =
  12. 12.16 × 8 =
  13. 13.49 × 4 =
  14. 14.70 × 4 =
  15. 15.25 × 8 =
  16. 16.28 × 4 =
  17. 17.47 × 4 =
  18. 18.18 × 8 =
  19. 19.31 × 4 =
  20. 20.16 × 4 =
  21. 21.59 × 4 =
  22. 22.21 × 4 =
  23. 23.14 × 8 =
  24. 24.39 × 8 =
  25. 25.65 × 4 =
  26. 26.21 × 8 =
  27. 27.41 × 4 =
  28. 28.37 × 8 =
  29. 29.24 × 4 =
  30. 30.56 × 4 =
  31. 31.38 × 8 =
  32. 32.30 × 4 =
  33. 33.15 × 8 =
  34. 34.72 × 4 =
  35. 35.34 × 4 =
  36. 36.45 × 4 =
  37. 37.36 × 8 =
  38. 38.30 × 8 =
  39. 39.20 × 4 =
  40. 40.26 × 8 =

Answer key

  1. 96
  2. 104
  3. 276
  4. 72
  5. 136
  6. 176
  7. 184
  8. 256
  9. 140
  10. 284
  11. 264
  12. 128
  13. 196
  14. 280
  15. 200
  16. 112
  17. 188
  18. 144
  19. 124
  20. 64
  21. 236
  22. 84
  23. 112
  24. 312
  25. 260
  26. 168
  27. 164
  28. 296
  29. 96
  30. 224
  31. 304
  32. 120
  33. 120
  34. 288
  35. 136
  36. 180
  37. 288
  38. 240
  39. 80
  40. 208

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