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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 859 · 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. 1.34 × 8 =
  2. 2.53 × 4 =
  3. 3.59 × 4 =
  4. 4.37 × 8 =
  5. 5.67 × 4 =
  6. 6.13 × 8 =
  7. 7.27 × 4 =
  8. 8.35 × 4 =
  9. 9.19 × 8 =
  10. 10.20 × 4 =
  11. 11.19 × 4 =
  12. 12.24 × 8 =
  13. 13.38 × 4 =
  14. 14.29 × 8 =
  15. 15.28 × 8 =
  16. 16.23 × 8 =
  17. 17.57 × 4 =
  18. 18.14 × 8 =
  19. 19.16 × 8 =
  20. 20.15 × 4 =
  21. 21.30 × 8 =
  22. 22.46 × 4 =
  23. 23.30 × 4 =
  24. 24.15 × 8 =
  25. 25.25 × 4 =
  26. 26.36 × 8 =
  27. 27.39 × 8 =
  28. 28.74 × 4 =
  29. 29.43 × 4 =
  30. 30.31 × 4 =
  31. 31.34 × 4 =
  32. 32.28 × 4 =
  33. 33.72 × 4 =
  34. 34.22 × 4 =
  35. 35.18 × 8 =
  36. 36.17 × 8 =
  37. 37.62 × 4 =
  38. 38.38 × 8 =
  39. 39.32 × 8 =
  40. 40.26 × 4 =

Answer key

  1. 272
  2. 212
  3. 236
  4. 296
  5. 268
  6. 104
  7. 108
  8. 140
  9. 152
  10. 80
  11. 76
  12. 192
  13. 152
  14. 232
  15. 224
  16. 184
  17. 228
  18. 112
  19. 128
  20. 60
  21. 240
  22. 184
  23. 120
  24. 120
  25. 100
  26. 288
  27. 312
  28. 296
  29. 172
  30. 124
  31. 136
  32. 112
  33. 288
  34. 88
  35. 144
  36. 136
  37. 248
  38. 304
  39. 256
  40. 104

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