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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 299 · 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. 1.31 × 8 =
  2. 2.27 × 8 =
  3. 3.24 × 4 =
  4. 4.64 × 4 =
  5. 5.34 × 8 =
  6. 6.73 × 4 =
  7. 7.15 × 8 =
  8. 8.28 × 4 =
  9. 9.12 × 8 =
  10. 10.29 × 4 =
  11. 11.23 × 8 =
  12. 12.26 × 4 =
  13. 13.14 × 4 =
  14. 14.20 × 8 =
  15. 15.18 × 8 =
  16. 16.39 × 4 =
  17. 17.32 × 4 =
  18. 18.19 × 8 =
  19. 19.32 × 8 =
  20. 20.61 × 4 =
  21. 21.53 × 4 =
  22. 22.40 × 8 =
  23. 23.49 × 4 =
  24. 24.22 × 8 =
  25. 25.62 × 4 =
  26. 26.17 × 8 =
  27. 27.42 × 4 =
  28. 28.38 × 8 =
  29. 29.26 × 8 =
  30. 30.38 × 4 =
  31. 31.31 × 4 =
  32. 32.60 × 4 =
  33. 33.22 × 4 =
  34. 34.45 × 4 =
  35. 35.20 × 4 =
  36. 36.17 × 4 =
  37. 37.59 × 4 =
  38. 38.37 × 8 =
  39. 39.48 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 248
  2. 216
  3. 96
  4. 256
  5. 272
  6. 292
  7. 120
  8. 112
  9. 96
  10. 116
  11. 184
  12. 104
  13. 56
  14. 160
  15. 144
  16. 156
  17. 128
  18. 152
  19. 256
  20. 244
  21. 212
  22. 320
  23. 196
  24. 176
  25. 248
  26. 136
  27. 168
  28. 304
  29. 208
  30. 152
  31. 124
  32. 240
  33. 88
  34. 180
  35. 80
  36. 68
  37. 236
  38. 296
  39. 192
  40. 184

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