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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 281 · 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. 1.41 × 4 =
  2. 2.27 × 8 =
  3. 3.43 × 4 =
  4. 4.13 × 4 =
  5. 5.12 × 4 =
  6. 6.31 × 8 =
  7. 7.39 × 4 =
  8. 8.19 × 8 =
  9. 9.14 × 4 =
  10. 10.30 × 4 =
  11. 11.67 × 4 =
  12. 12.16 × 8 =
  13. 13.16 × 4 =
  14. 14.61 × 4 =
  15. 15.33 × 8 =
  16. 16.38 × 8 =
  17. 17.25 × 8 =
  18. 18.20 × 8 =
  19. 19.13 × 8 =
  20. 20.34 × 8 =
  21. 21.48 × 4 =
  22. 22.28 × 8 =
  23. 23.23 × 8 =
  24. 24.66 × 4 =
  25. 25.26 × 4 =
  26. 26.58 × 4 =
  27. 27.21 × 4 =
  28. 28.40 × 8 =
  29. 29.33 × 4 =
  30. 30.37 × 8 =
  31. 31.17 × 8 =
  32. 32.56 × 4 =
  33. 33.37 × 4 =
  34. 34.22 × 8 =
  35. 35.24 × 4 =
  36. 36.29 × 4 =
  37. 37.24 × 8 =
  38. 38.19 × 4 =
  39. 39.31 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 164
  2. 216
  3. 172
  4. 52
  5. 48
  6. 248
  7. 156
  8. 152
  9. 56
  10. 120
  11. 268
  12. 128
  13. 64
  14. 244
  15. 264
  16. 304
  17. 200
  18. 160
  19. 104
  20. 272
  21. 192
  22. 224
  23. 184
  24. 264
  25. 104
  26. 232
  27. 84
  28. 320
  29. 132
  30. 296
  31. 136
  32. 224
  33. 148
  34. 176
  35. 96
  36. 116
  37. 192
  38. 76
  39. 124
  40. 96

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