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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 623 · 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. 1.29 × 8 =
  2. 2.30 × 8 =
  3. 3.27 × 8 =
  4. 4.74 × 4 =
  5. 5.51 × 4 =
  6. 6.12 × 8 =
  7. 7.36 × 8 =
  8. 8.61 × 4 =
  9. 9.14 × 8 =
  10. 10.19 × 4 =
  11. 11.25 × 4 =
  12. 12.35 × 8 =
  13. 13.72 × 4 =
  14. 14.57 × 4 =
  15. 15.23 × 8 =
  16. 16.71 × 4 =
  17. 17.17 × 8 =
  18. 18.13 × 8 =
  19. 19.40 × 8 =
  20. 20.15 × 8 =
  21. 21.39 × 8 =
  22. 22.38 × 8 =
  23. 23.15 × 4 =
  24. 24.21 × 4 =
  25. 25.75 × 4 =
  26. 26.22 × 8 =
  27. 27.67 × 4 =
  28. 28.41 × 4 =
  29. 29.56 × 4 =
  30. 30.53 × 4 =
  31. 31.36 × 4 =
  32. 32.24 × 4 =
  33. 33.48 × 4 =
  34. 34.22 × 4 =
  35. 35.34 × 4 =
  36. 36.37 × 8 =
  37. 37.23 × 4 =
  38. 38.12 × 4 =
  39. 39.32 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 232
  2. 240
  3. 216
  4. 296
  5. 204
  6. 96
  7. 288
  8. 244
  9. 112
  10. 76
  11. 100
  12. 280
  13. 288
  14. 228
  15. 184
  16. 284
  17. 136
  18. 104
  19. 320
  20. 120
  21. 312
  22. 304
  23. 60
  24. 84
  25. 300
  26. 176
  27. 268
  28. 164
  29. 224
  30. 212
  31. 144
  32. 96
  33. 192
  34. 88
  35. 136
  36. 296
  37. 92
  38. 48
  39. 256
  40. 160

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