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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 4 · 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. 1.39 × 4 =
  2. 2.31 × 4 =
  3. 3.64 × 4 =
  4. 4.27 × 8 =
  5. 5.16 × 8 =
  6. 6.33 × 4 =
  7. 7.23 × 8 =
  8. 8.65 × 4 =
  9. 9.55 × 4 =
  10. 10.23 × 4 =
  11. 11.27 × 4 =
  12. 12.38 × 8 =
  13. 13.39 × 8 =
  14. 14.60 × 4 =
  15. 15.71 × 4 =
  16. 16.30 × 8 =
  17. 17.69 × 4 =
  18. 18.14 × 8 =
  19. 19.46 × 4 =
  20. 20.41 × 4 =
  21. 21.33 × 8 =
  22. 22.22 × 8 =
  23. 23.29 × 4 =
  24. 24.17 × 8 =
  25. 25.74 × 4 =
  26. 26.51 × 4 =
  27. 27.66 × 4 =
  28. 28.20 × 8 =
  29. 29.12 × 8 =
  30. 30.59 × 4 =
  31. 31.31 × 8 =
  32. 32.18 × 8 =
  33. 33.28 × 8 =
  34. 34.13 × 4 =
  35. 35.62 × 4 =
  36. 36.13 × 8 =
  37. 37.58 × 4 =
  38. 38.61 × 4 =
  39. 39.19 × 8 =
  40. 40.57 × 4 =

Answer key

  1. 156
  2. 124
  3. 256
  4. 216
  5. 128
  6. 132
  7. 184
  8. 260
  9. 220
  10. 92
  11. 108
  12. 304
  13. 312
  14. 240
  15. 284
  16. 240
  17. 276
  18. 112
  19. 184
  20. 164
  21. 264
  22. 176
  23. 116
  24. 136
  25. 296
  26. 204
  27. 264
  28. 160
  29. 96
  30. 236
  31. 248
  32. 144
  33. 224
  34. 52
  35. 248
  36. 104
  37. 232
  38. 244
  39. 152
  40. 228

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