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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 230 · 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. 1.37 × 8 =
  2. 2.12 × 8 =
  3. 3.47 × 4 =
  4. 4.53 × 4 =
  5. 5.16 × 8 =
  6. 6.26 × 8 =
  7. 7.40 × 8 =
  8. 8.27 × 8 =
  9. 9.25 × 8 =
  10. 10.21 × 4 =
  11. 11.64 × 4 =
  12. 12.17 × 8 =
  13. 13.14 × 8 =
  14. 14.26 × 4 =
  15. 15.52 × 4 =
  16. 16.54 × 4 =
  17. 17.40 × 4 =
  18. 18.38 × 8 =
  19. 19.14 × 4 =
  20. 20.29 × 8 =
  21. 21.22 × 4 =
  22. 22.20 × 8 =
  23. 23.45 × 4 =
  24. 24.74 × 4 =
  25. 25.28 × 4 =
  26. 26.38 × 4 =
  27. 27.72 × 4 =
  28. 28.63 × 4 =
  29. 29.30 × 8 =
  30. 30.58 × 4 =
  31. 31.50 × 4 =
  32. 32.13 × 8 =
  33. 33.43 × 4 =
  34. 34.75 × 4 =
  35. 35.17 × 4 =
  36. 36.51 × 4 =
  37. 37.66 × 4 =
  38. 38.28 × 8 =
  39. 39.18 × 8 =
  40. 40.31 × 4 =

Answer key

  1. 296
  2. 96
  3. 188
  4. 212
  5. 128
  6. 208
  7. 320
  8. 216
  9. 200
  10. 84
  11. 256
  12. 136
  13. 112
  14. 104
  15. 208
  16. 216
  17. 160
  18. 304
  19. 56
  20. 232
  21. 88
  22. 160
  23. 180
  24. 296
  25. 112
  26. 152
  27. 288
  28. 252
  29. 240
  30. 232
  31. 200
  32. 104
  33. 172
  34. 300
  35. 68
  36. 204
  37. 264
  38. 224
  39. 144
  40. 124

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