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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 183 · 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. 1.29 × 8 =
  2. 2.13 × 8 =
  3. 3.50 × 4 =
  4. 4.52 × 4 =
  5. 5.29 × 4 =
  6. 6.44 × 4 =
  7. 7.33 × 8 =
  8. 8.39 × 4 =
  9. 9.56 × 4 =
  10. 10.22 × 8 =
  11. 11.45 × 4 =
  12. 12.36 × 8 =
  13. 13.25 × 4 =
  14. 14.17 × 8 =
  15. 15.73 × 4 =
  16. 16.18 × 8 =
  17. 17.38 × 8 =
  18. 18.19 × 8 =
  19. 19.23 × 4 =
  20. 20.12 × 8 =
  21. 21.30 × 8 =
  22. 22.74 × 4 =
  23. 23.57 × 4 =
  24. 24.35 × 4 =
  25. 25.31 × 4 =
  26. 26.68 × 4 =
  27. 27.21 × 4 =
  28. 28.39 × 8 =
  29. 29.66 × 4 =
  30. 30.26 × 8 =
  31. 31.51 × 4 =
  32. 32.12 × 4 =
  33. 33.36 × 4 =
  34. 34.71 × 4 =
  35. 35.65 × 4 =
  36. 36.32 × 8 =
  37. 37.55 × 4 =
  38. 38.28 × 8 =
  39. 39.24 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 232
  2. 104
  3. 200
  4. 208
  5. 116
  6. 176
  7. 264
  8. 156
  9. 224
  10. 176
  11. 180
  12. 288
  13. 100
  14. 136
  15. 292
  16. 144
  17. 304
  18. 152
  19. 92
  20. 96
  21. 240
  22. 296
  23. 228
  24. 140
  25. 124
  26. 272
  27. 84
  28. 312
  29. 264
  30. 208
  31. 204
  32. 48
  33. 144
  34. 284
  35. 260
  36. 256
  37. 220
  38. 224
  39. 192
  40. 72

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