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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 235 · 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. 1.29 × 8 =
  2. 2.66 × 4 =
  3. 3.75 × 4 =
  4. 4.15 × 4 =
  5. 5.51 × 4 =
  6. 6.19 × 8 =
  7. 7.34 × 8 =
  8. 8.15 × 8 =
  9. 9.28 × 4 =
  10. 10.54 × 4 =
  11. 11.12 × 8 =
  12. 12.20 × 4 =
  13. 13.40 × 4 =
  14. 14.31 × 8 =
  15. 15.14 × 8 =
  16. 16.30 × 8 =
  17. 17.18 × 4 =
  18. 18.65 × 4 =
  19. 19.52 × 4 =
  20. 20.72 × 4 =
  21. 21.27 × 8 =
  22. 22.55 × 4 =
  23. 23.45 × 4 =
  24. 24.64 × 4 =
  25. 25.40 × 8 =
  26. 26.21 × 8 =
  27. 27.17 × 8 =
  28. 28.26 × 8 =
  29. 29.31 × 4 =
  30. 30.27 × 4 =
  31. 31.13 × 8 =
  32. 32.36 × 8 =
  33. 33.25 × 8 =
  34. 34.24 × 8 =
  35. 35.23 × 8 =
  36. 36.29 × 4 =
  37. 37.53 × 4 =
  38. 38.73 × 4 =
  39. 39.22 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 232
  2. 264
  3. 300
  4. 60
  5. 204
  6. 152
  7. 272
  8. 120
  9. 112
  10. 216
  11. 96
  12. 80
  13. 160
  14. 248
  15. 112
  16. 240
  17. 72
  18. 260
  19. 208
  20. 288
  21. 216
  22. 220
  23. 180
  24. 256
  25. 320
  26. 168
  27. 136
  28. 208
  29. 124
  30. 108
  31. 104
  32. 288
  33. 200
  34. 192
  35. 184
  36. 116
  37. 212
  38. 292
  39. 176
  40. 56

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