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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 52 · 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. 1.30 × 4 =
  2. 2.47 × 4 =
  3. 3.37 × 8 =
  4. 4.14 × 4 =
  5. 5.19 × 8 =
  6. 6.33 × 4 =
  7. 7.38 × 4 =
  8. 8.69 × 4 =
  9. 9.18 × 8 =
  10. 10.34 × 4 =
  11. 11.40 × 8 =
  12. 12.21 × 4 =
  13. 13.26 × 4 =
  14. 14.74 × 4 =
  15. 15.16 × 8 =
  16. 16.29 × 8 =
  17. 17.70 × 4 =
  18. 18.15 × 8 =
  19. 19.25 × 4 =
  20. 20.57 × 4 =
  21. 21.18 × 4 =
  22. 22.58 × 4 =
  23. 23.21 × 8 =
  24. 24.13 × 4 =
  25. 25.25 × 8 =
  26. 26.14 × 8 =
  27. 27.43 × 4 =
  28. 28.40 × 4 =
  29. 29.36 × 8 =
  30. 30.63 × 4 =
  31. 31.27 × 8 =
  32. 32.22 × 4 =
  33. 33.12 × 8 =
  34. 34.13 × 8 =
  35. 35.31 × 8 =
  36. 36.52 × 4 =
  37. 37.75 × 4 =
  38. 38.30 × 8 =
  39. 39.24 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 120
  2. 188
  3. 296
  4. 56
  5. 152
  6. 132
  7. 152
  8. 276
  9. 144
  10. 136
  11. 320
  12. 84
  13. 104
  14. 296
  15. 128
  16. 232
  17. 280
  18. 120
  19. 100
  20. 228
  21. 72
  22. 232
  23. 168
  24. 52
  25. 200
  26. 112
  27. 172
  28. 160
  29. 288
  30. 252
  31. 216
  32. 88
  33. 96
  34. 104
  35. 248
  36. 208
  37. 300
  38. 240
  39. 96
  40. 192

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