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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 300 · 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. 2.18 × 8 =
  3. 3.33 × 4 =
  4. 4.57 × 4 =
  5. 5.17 × 8 =
  6. 6.13 × 4 =
  7. 7.42 × 4 =
  8. 8.15 × 4 =
  9. 9.39 × 8 =
  10. 10.30 × 8 =
  11. 11.58 × 4 =
  12. 12.31 × 4 =
  13. 13.71 × 4 =
  14. 14.36 × 8 =
  15. 15.16 × 8 =
  16. 16.27 × 8 =
  17. 17.23 × 4 =
  18. 18.19 × 8 =
  19. 19.17 × 4 =
  20. 20.48 × 4 =
  21. 21.25 × 8 =
  22. 22.56 × 4 =
  23. 23.28 × 8 =
  24. 24.43 × 4 =
  25. 25.74 × 4 =
  26. 26.34 × 4 =
  27. 27.61 × 4 =
  28. 28.59 × 4 =
  29. 29.51 × 4 =
  30. 30.24 × 4 =
  31. 31.64 × 4 =
  32. 32.29 × 4 =
  33. 33.22 × 4 =
  34. 34.21 × 8 =
  35. 35.69 × 4 =
  36. 36.50 × 4 =
  37. 37.25 × 4 =
  38. 38.26 × 4 =
  39. 39.20 × 8 =
  40. 40.32 × 4 =

Answer key

  1. 248
  2. 144
  3. 132
  4. 228
  5. 136
  6. 52
  7. 168
  8. 60
  9. 312
  10. 240
  11. 232
  12. 124
  13. 284
  14. 288
  15. 128
  16. 216
  17. 92
  18. 152
  19. 68
  20. 192
  21. 200
  22. 224
  23. 224
  24. 172
  25. 296
  26. 136
  27. 244
  28. 236
  29. 204
  30. 96
  31. 256
  32. 116
  33. 88
  34. 168
  35. 276
  36. 200
  37. 100
  38. 104
  39. 160
  40. 128

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