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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 379 · 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. 1.12 × 8 =
  2. 2.23 × 8 =
  3. 3.36 × 8 =
  4. 4.28 × 8 =
  5. 5.54 × 4 =
  6. 6.34 × 8 =
  7. 7.69 × 4 =
  8. 8.13 × 8 =
  9. 9.32 × 8 =
  10. 10.60 × 4 =
  11. 11.16 × 8 =
  12. 12.38 × 4 =
  13. 13.23 × 4 =
  14. 14.59 × 4 =
  15. 15.27 × 8 =
  16. 16.15 × 8 =
  17. 17.22 × 8 =
  18. 18.63 × 4 =
  19. 19.14 × 8 =
  20. 20.26 × 4 =
  21. 21.34 × 4 =
  22. 22.46 × 4 =
  23. 23.28 × 4 =
  24. 24.37 × 8 =
  25. 25.17 × 4 =
  26. 26.18 × 8 =
  27. 27.19 × 4 =
  28. 28.58 × 4 =
  29. 29.22 × 4 =
  30. 30.41 × 4 =
  31. 31.30 × 4 =
  32. 32.42 × 4 =
  33. 33.26 × 8 =
  34. 34.20 × 8 =
  35. 35.14 × 4 =
  36. 36.40 × 4 =
  37. 37.17 × 8 =
  38. 38.18 × 4 =
  39. 39.31 × 8 =
  40. 40.29 × 8 =

Answer key

  1. 96
  2. 184
  3. 288
  4. 224
  5. 216
  6. 272
  7. 276
  8. 104
  9. 256
  10. 240
  11. 128
  12. 152
  13. 92
  14. 236
  15. 216
  16. 120
  17. 176
  18. 252
  19. 112
  20. 104
  21. 136
  22. 184
  23. 112
  24. 296
  25. 68
  26. 144
  27. 76
  28. 232
  29. 88
  30. 164
  31. 120
  32. 168
  33. 208
  34. 160
  35. 56
  36. 160
  37. 136
  38. 72
  39. 248
  40. 232

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