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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 186 · 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. 1.69 × 4 =
  2. 2.64 × 4 =
  3. 3.74 × 4 =
  4. 4.26 × 4 =
  5. 5.14 × 8 =
  6. 6.39 × 4 =
  7. 7.19 × 4 =
  8. 8.38 × 4 =
  9. 9.40 × 4 =
  10. 10.28 × 8 =
  11. 11.29 × 8 =
  12. 12.31 × 8 =
  13. 13.51 × 4 =
  14. 14.75 × 4 =
  15. 15.63 × 4 =
  16. 16.71 × 4 =
  17. 17.12 × 8 =
  18. 18.31 × 4 =
  19. 19.20 × 8 =
  20. 20.53 × 4 =
  21. 21.13 × 4 =
  22. 22.30 × 8 =
  23. 23.52 × 4 =
  24. 24.20 × 4 =
  25. 25.23 × 8 =
  26. 26.44 × 4 =
  27. 27.19 × 8 =
  28. 28.17 × 4 =
  29. 29.12 × 4 =
  30. 30.30 × 4 =
  31. 31.72 × 4 =
  32. 32.47 × 4 =
  33. 33.15 × 8 =
  34. 34.32 × 8 =
  35. 35.39 × 8 =
  36. 36.37 × 4 =
  37. 37.25 × 8 =
  38. 38.60 × 4 =
  39. 39.13 × 8 =
  40. 40.65 × 4 =

Answer key

  1. 276
  2. 256
  3. 296
  4. 104
  5. 112
  6. 156
  7. 76
  8. 152
  9. 160
  10. 224
  11. 232
  12. 248
  13. 204
  14. 300
  15. 252
  16. 284
  17. 96
  18. 124
  19. 160
  20. 212
  21. 52
  22. 240
  23. 208
  24. 80
  25. 184
  26. 176
  27. 152
  28. 68
  29. 48
  30. 120
  31. 288
  32. 188
  33. 120
  34. 256
  35. 312
  36. 148
  37. 200
  38. 240
  39. 104
  40. 260

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