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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 145 · 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. 1.18 × 4 =
  2. 2.19 × 8 =
  3. 3.27 × 4 =
  4. 4.24 × 4 =
  5. 5.31 × 4 =
  6. 6.62 × 4 =
  7. 7.15 × 8 =
  8. 8.39 × 8 =
  9. 9.24 × 8 =
  10. 10.39 × 4 =
  11. 11.57 × 4 =
  12. 12.21 × 4 =
  13. 13.20 × 8 =
  14. 14.17 × 4 =
  15. 15.29 × 8 =
  16. 16.31 × 8 =
  17. 17.41 × 4 =
  18. 18.49 × 4 =
  19. 19.13 × 8 =
  20. 20.26 × 8 =
  21. 21.37 × 8 =
  22. 22.32 × 8 =
  23. 23.63 × 4 =
  24. 24.16 × 8 =
  25. 25.14 × 8 =
  26. 26.33 × 4 =
  27. 27.27 × 8 =
  28. 28.21 × 8 =
  29. 29.28 × 8 =
  30. 30.15 × 4 =
  31. 31.25 × 8 =
  32. 32.19 × 4 =
  33. 33.36 × 8 =
  34. 34.17 × 8 =
  35. 35.34 × 8 =
  36. 36.29 × 4 =
  37. 37.67 × 4 =
  38. 38.40 × 8 =
  39. 39.35 × 8 =
  40. 40.54 × 4 =

Answer key

  1. 72
  2. 152
  3. 108
  4. 96
  5. 124
  6. 248
  7. 120
  8. 312
  9. 192
  10. 156
  11. 228
  12. 84
  13. 160
  14. 68
  15. 232
  16. 248
  17. 164
  18. 196
  19. 104
  20. 208
  21. 296
  22. 256
  23. 252
  24. 128
  25. 112
  26. 132
  27. 216
  28. 168
  29. 224
  30. 60
  31. 200
  32. 76
  33. 288
  34. 136
  35. 272
  36. 116
  37. 268
  38. 320
  39. 280
  40. 216

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