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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 84 · 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 × 4 =
  2. 2.30 × 4 =
  3. 3.14 × 8 =
  4. 4.24 × 8 =
  5. 5.37 × 4 =
  6. 6.24 × 4 =
  7. 7.19 × 4 =
  8. 8.52 × 4 =
  9. 9.29 × 8 =
  10. 10.26 × 8 =
  11. 11.18 × 4 =
  12. 12.12 × 8 =
  13. 13.41 × 4 =
  14. 14.14 × 4 =
  15. 15.16 × 8 =
  16. 16.49 × 4 =
  17. 17.31 × 8 =
  18. 18.34 × 4 =
  19. 19.51 × 4 =
  20. 20.27 × 4 =
  21. 21.23 × 8 =
  22. 22.17 × 8 =
  23. 23.65 × 4 =
  24. 24.30 × 8 =
  25. 25.58 × 4 =
  26. 26.55 × 4 =
  27. 27.66 × 4 =
  28. 28.36 × 8 =
  29. 29.59 × 4 =
  30. 30.33 × 4 =
  31. 31.22 × 8 =
  32. 32.47 × 4 =
  33. 33.20 × 8 =
  34. 34.28 × 4 =
  35. 35.15 × 4 =
  36. 36.75 × 4 =
  37. 37.31 × 4 =
  38. 38.25 × 4 =
  39. 39.42 × 4 =
  40. 40.29 × 4 =

Answer key

  1. 152
  2. 120
  3. 112
  4. 192
  5. 148
  6. 96
  7. 76
  8. 208
  9. 232
  10. 208
  11. 72
  12. 96
  13. 164
  14. 56
  15. 128
  16. 196
  17. 248
  18. 136
  19. 204
  20. 108
  21. 184
  22. 136
  23. 260
  24. 240
  25. 232
  26. 220
  27. 264
  28. 288
  29. 236
  30. 132
  31. 176
  32. 188
  33. 160
  34. 112
  35. 60
  36. 300
  37. 124
  38. 100
  39. 168
  40. 116

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