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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 632 · 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. 1.14 × 8 =
  2. 2.37 × 8 =
  3. 3.17 × 8 =
  4. 4.24 × 4 =
  5. 5.47 × 4 =
  6. 6.41 × 4 =
  7. 7.21 × 8 =
  8. 8.27 × 8 =
  9. 9.34 × 4 =
  10. 10.30 × 8 =
  11. 11.15 × 8 =
  12. 12.30 × 4 =
  13. 13.66 × 4 =
  14. 14.40 × 8 =
  15. 15.74 × 4 =
  16. 16.23 × 8 =
  17. 17.18 × 8 =
  18. 18.16 × 4 =
  19. 19.36 × 8 =
  20. 20.19 × 4 =
  21. 21.25 × 8 =
  22. 22.61 × 4 =
  23. 23.57 × 4 =
  24. 24.13 × 8 =
  25. 25.19 × 8 =
  26. 26.26 × 8 =
  27. 27.25 × 4 =
  28. 28.52 × 4 =
  29. 29.42 × 4 =
  30. 30.13 × 4 =
  31. 31.22 × 8 =
  32. 32.20 × 4 =
  33. 33.39 × 4 =
  34. 34.65 × 4 =
  35. 35.26 × 4 =
  36. 36.49 × 4 =
  37. 37.20 × 8 =
  38. 38.29 × 8 =
  39. 39.32 × 8 =
  40. 40.24 × 8 =

Answer key

  1. 112
  2. 296
  3. 136
  4. 96
  5. 188
  6. 164
  7. 168
  8. 216
  9. 136
  10. 240
  11. 120
  12. 120
  13. 264
  14. 320
  15. 296
  16. 184
  17. 144
  18. 64
  19. 288
  20. 76
  21. 200
  22. 244
  23. 228
  24. 104
  25. 152
  26. 208
  27. 100
  28. 208
  29. 168
  30. 52
  31. 176
  32. 80
  33. 156
  34. 260
  35. 104
  36. 196
  37. 160
  38. 232
  39. 256
  40. 192

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