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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 237 · 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. 2.28 × 4 =
  3. 3.15 × 8 =
  4. 4.52 × 4 =
  5. 5.22 × 8 =
  6. 6.33 × 8 =
  7. 7.20 × 4 =
  8. 8.13 × 8 =
  9. 9.72 × 4 =
  10. 10.31 × 8 =
  11. 11.28 × 8 =
  12. 12.47 × 4 =
  13. 13.27 × 4 =
  14. 14.24 × 8 =
  15. 15.26 × 8 =
  16. 16.60 × 4 =
  17. 17.49 × 4 =
  18. 18.16 × 8 =
  19. 19.34 × 8 =
  20. 20.23 × 4 =
  21. 21.35 × 4 =
  22. 22.66 × 4 =
  23. 23.26 × 4 =
  24. 24.75 × 4 =
  25. 25.30 × 4 =
  26. 26.42 × 4 =
  27. 27.41 × 4 =
  28. 28.70 × 4 =
  29. 29.53 × 4 =
  30. 30.13 × 4 =
  31. 31.21 × 8 =
  32. 32.12 × 8 =
  33. 33.17 × 8 =
  34. 34.71 × 4 =
  35. 35.45 × 4 =
  36. 36.16 × 4 =
  37. 37.21 × 4 =
  38. 38.27 × 8 =
  39. 39.31 × 4 =
  40. 40.74 × 4 =

Answer key

  1. 184
  2. 112
  3. 120
  4. 208
  5. 176
  6. 264
  7. 80
  8. 104
  9. 288
  10. 248
  11. 224
  12. 188
  13. 108
  14. 192
  15. 208
  16. 240
  17. 196
  18. 128
  19. 272
  20. 92
  21. 140
  22. 264
  23. 104
  24. 300
  25. 120
  26. 168
  27. 164
  28. 280
  29. 212
  30. 52
  31. 168
  32. 96
  33. 136
  34. 284
  35. 180
  36. 64
  37. 84
  38. 216
  39. 124
  40. 296

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