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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 30 · 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. 1.48 × 4 =
  2. 2.54 × 4 =
  3. 3.33 × 8 =
  4. 4.49 × 4 =
  5. 5.26 × 4 =
  6. 6.29 × 8 =
  7. 7.52 × 4 =
  8. 8.16 × 4 =
  9. 9.33 × 4 =
  10. 10.23 × 4 =
  11. 11.19 × 8 =
  12. 12.26 × 8 =
  13. 13.28 × 8 =
  14. 14.65 × 4 =
  15. 15.58 × 4 =
  16. 16.31 × 8 =
  17. 17.18 × 8 =
  18. 18.40 × 4 =
  19. 19.36 × 4 =
  20. 20.39 × 8 =
  21. 21.24 × 4 =
  22. 22.29 × 4 =
  23. 23.40 × 8 =
  24. 24.46 × 4 =
  25. 25.15 × 8 =
  26. 26.13 × 4 =
  27. 27.14 × 4 =
  28. 28.18 × 4 =
  29. 29.66 × 4 =
  30. 30.21 × 8 =
  31. 31.37 × 4 =
  32. 32.61 × 4 =
  33. 33.22 × 8 =
  34. 34.69 × 4 =
  35. 35.30 × 4 =
  36. 36.21 × 4 =
  37. 37.75 × 4 =
  38. 38.30 × 8 =
  39. 39.15 × 4 =
  40. 40.12 × 4 =

Answer key

  1. 192
  2. 216
  3. 264
  4. 196
  5. 104
  6. 232
  7. 208
  8. 64
  9. 132
  10. 92
  11. 152
  12. 208
  13. 224
  14. 260
  15. 232
  16. 248
  17. 144
  18. 160
  19. 144
  20. 312
  21. 96
  22. 116
  23. 320
  24. 184
  25. 120
  26. 52
  27. 56
  28. 72
  29. 264
  30. 168
  31. 148
  32. 244
  33. 176
  34. 276
  35. 120
  36. 84
  37. 300
  38. 240
  39. 60
  40. 48

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