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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 202 · 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. 1.23 × 8 =
  2. 2.15 × 4 =
  3. 3.62 × 4 =
  4. 4.13 × 4 =
  5. 5.34 × 8 =
  6. 6.12 × 8 =
  7. 7.29 × 8 =
  8. 8.22 × 4 =
  9. 9.16 × 8 =
  10. 10.19 × 8 =
  11. 11.40 × 8 =
  12. 12.17 × 8 =
  13. 13.73 × 4 =
  14. 14.65 × 4 =
  15. 15.28 × 4 =
  16. 16.26 × 8 =
  17. 17.41 × 4 =
  18. 18.35 × 8 =
  19. 19.47 × 4 =
  20. 20.16 × 4 =
  21. 21.68 × 4 =
  22. 22.66 × 4 =
  23. 23.39 × 4 =
  24. 24.21 × 8 =
  25. 25.18 × 8 =
  26. 26.22 × 8 =
  27. 27.55 × 4 =
  28. 28.13 × 8 =
  29. 29.27 × 4 =
  30. 30.74 × 4 =
  31. 31.54 × 4 =
  32. 32.15 × 8 =
  33. 33.56 × 4 =
  34. 34.27 × 8 =
  35. 35.24 × 8 =
  36. 36.48 × 4 =
  37. 37.70 × 4 =
  38. 38.30 × 4 =
  39. 39.46 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 184
  2. 60
  3. 248
  4. 52
  5. 272
  6. 96
  7. 232
  8. 88
  9. 128
  10. 152
  11. 320
  12. 136
  13. 292
  14. 260
  15. 112
  16. 208
  17. 164
  18. 280
  19. 188
  20. 64
  21. 272
  22. 264
  23. 156
  24. 168
  25. 144
  26. 176
  27. 220
  28. 104
  29. 108
  30. 296
  31. 216
  32. 120
  33. 224
  34. 216
  35. 192
  36. 192
  37. 280
  38. 120
  39. 184
  40. 200

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