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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 188 · 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 × 4 =
  2. 2.35 × 8 =
  3. 3.42 × 4 =
  4. 4.15 × 8 =
  5. 5.55 × 4 =
  6. 6.13 × 4 =
  7. 7.24 × 4 =
  8. 8.19 × 8 =
  9. 9.33 × 4 =
  10. 10.75 × 4 =
  11. 11.26 × 4 =
  12. 12.14 × 8 =
  13. 13.62 × 4 =
  14. 14.66 × 4 =
  15. 15.20 × 8 =
  16. 16.31 × 8 =
  17. 17.34 × 8 =
  18. 18.40 × 4 =
  19. 19.18 × 8 =
  20. 20.32 × 8 =
  21. 21.17 × 8 =
  22. 22.36 × 8 =
  23. 23.37 × 8 =
  24. 24.18 × 4 =
  25. 25.17 × 4 =
  26. 26.52 × 4 =
  27. 27.39 × 4 =
  28. 28.23 × 8 =
  29. 29.30 × 4 =
  30. 30.58 × 4 =
  31. 31.56 × 4 =
  32. 32.40 × 8 =
  33. 33.15 × 4 =
  34. 34.41 × 4 =
  35. 35.68 × 4 =
  36. 36.35 × 4 =
  37. 37.67 × 4 =
  38. 38.21 × 8 =
  39. 39.59 × 4 =
  40. 40.22 × 4 =

Answer key

  1. 92
  2. 280
  3. 168
  4. 120
  5. 220
  6. 52
  7. 96
  8. 152
  9. 132
  10. 300
  11. 104
  12. 112
  13. 248
  14. 264
  15. 160
  16. 248
  17. 272
  18. 160
  19. 144
  20. 256
  21. 136
  22. 288
  23. 296
  24. 72
  25. 68
  26. 208
  27. 156
  28. 184
  29. 120
  30. 232
  31. 224
  32. 320
  33. 60
  34. 164
  35. 272
  36. 140
  37. 268
  38. 168
  39. 236
  40. 88

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