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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 6 · 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. 1.38 × 8 =
  2. 2.32 × 8 =
  3. 3.70 × 4 =
  4. 4.29 × 4 =
  5. 5.30 × 4 =
  6. 6.63 × 4 =
  7. 7.15 × 8 =
  8. 8.54 × 4 =
  9. 9.75 × 4 =
  10. 10.14 × 4 =
  11. 11.22 × 4 =
  12. 12.62 × 4 =
  13. 13.24 × 4 =
  14. 14.36 × 8 =
  15. 15.18 × 4 =
  16. 16.59 × 4 =
  17. 17.15 × 4 =
  18. 18.40 × 8 =
  19. 19.22 × 8 =
  20. 20.61 × 4 =
  21. 21.34 × 8 =
  22. 22.57 × 4 =
  23. 23.19 × 8 =
  24. 24.19 × 4 =
  25. 25.26 × 8 =
  26. 26.28 × 4 =
  27. 27.27 × 4 =
  28. 28.36 × 4 =
  29. 29.13 × 4 =
  30. 30.67 × 4 =
  31. 31.26 × 4 =
  32. 32.53 × 4 =
  33. 33.18 × 8 =
  34. 34.39 × 8 =
  35. 35.37 × 8 =
  36. 36.39 × 4 =
  37. 37.34 × 4 =
  38. 38.28 × 8 =
  39. 39.51 × 4 =
  40. 40.40 × 4 =

Answer key

  1. 304
  2. 256
  3. 280
  4. 116
  5. 120
  6. 252
  7. 120
  8. 216
  9. 300
  10. 56
  11. 88
  12. 248
  13. 96
  14. 288
  15. 72
  16. 236
  17. 60
  18. 320
  19. 176
  20. 244
  21. 272
  22. 228
  23. 152
  24. 76
  25. 208
  26. 112
  27. 108
  28. 144
  29. 52
  30. 268
  31. 104
  32. 212
  33. 144
  34. 312
  35. 296
  36. 156
  37. 136
  38. 224
  39. 204
  40. 160

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