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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 34 · 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. 1.37 × 8 =
  2. 2.21 × 4 =
  3. 3.13 × 8 =
  4. 4.22 × 8 =
  5. 5.74 × 4 =
  6. 6.37 × 4 =
  7. 7.36 × 8 =
  8. 8.52 × 4 =
  9. 9.14 × 4 =
  10. 10.19 × 8 =
  11. 11.31 × 8 =
  12. 12.13 × 4 =
  13. 13.28 × 4 =
  14. 14.16 × 8 =
  15. 15.28 × 8 =
  16. 16.48 × 4 =
  17. 17.69 × 4 =
  18. 18.64 × 4 =
  19. 19.18 × 8 =
  20. 20.35 × 4 =
  21. 21.12 × 4 =
  22. 22.38 × 4 =
  23. 23.23 × 8 =
  24. 24.34 × 4 =
  25. 25.32 × 8 =
  26. 26.58 × 4 =
  27. 27.31 × 4 =
  28. 28.59 × 4 =
  29. 29.25 × 4 =
  30. 30.20 × 8 =
  31. 31.66 × 4 =
  32. 32.29 × 4 =
  33. 33.29 × 8 =
  34. 34.72 × 4 =
  35. 35.19 × 4 =
  36. 36.20 × 4 =
  37. 37.57 × 4 =
  38. 38.17 × 8 =
  39. 39.24 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 296
  2. 84
  3. 104
  4. 176
  5. 296
  6. 148
  7. 288
  8. 208
  9. 56
  10. 152
  11. 248
  12. 52
  13. 112
  14. 128
  15. 224
  16. 192
  17. 276
  18. 256
  19. 144
  20. 140
  21. 48
  22. 152
  23. 184
  24. 136
  25. 256
  26. 232
  27. 124
  28. 236
  29. 100
  30. 160
  31. 264
  32. 116
  33. 232
  34. 288
  35. 76
  36. 80
  37. 228
  38. 136
  39. 96
  40. 280

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