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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 26 · 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. 1.33 × 8 =
  2. 2.28 × 8 =
  3. 3.64 × 4 =
  4. 4.17 × 8 =
  5. 5.18 × 4 =
  6. 6.39 × 8 =
  7. 7.21 × 8 =
  8. 8.54 × 4 =
  9. 9.44 × 4 =
  10. 10.29 × 4 =
  11. 11.34 × 8 =
  12. 12.17 × 4 =
  13. 13.58 × 4 =
  14. 14.61 × 4 =
  15. 15.45 × 4 =
  16. 16.14 × 8 =
  17. 17.74 × 4 =
  18. 18.24 × 8 =
  19. 19.19 × 8 =
  20. 20.30 × 8 =
  21. 21.52 × 4 =
  22. 22.14 × 4 =
  23. 23.41 × 4 =
  24. 24.27 × 8 =
  25. 25.59 × 4 =
  26. 26.19 × 4 =
  27. 27.40 × 8 =
  28. 28.34 × 4 =
  29. 29.20 × 8 =
  30. 30.57 × 4 =
  31. 31.20 × 4 =
  32. 32.66 × 4 =
  33. 33.21 × 4 =
  34. 34.16 × 4 =
  35. 35.73 × 4 =
  36. 36.39 × 4 =
  37. 37.60 × 4 =
  38. 38.37 × 4 =
  39. 39.51 × 4 =
  40. 40.70 × 4 =

Answer key

  1. 264
  2. 224
  3. 256
  4. 136
  5. 72
  6. 312
  7. 168
  8. 216
  9. 176
  10. 116
  11. 272
  12. 68
  13. 232
  14. 244
  15. 180
  16. 112
  17. 296
  18. 192
  19. 152
  20. 240
  21. 208
  22. 56
  23. 164
  24. 216
  25. 236
  26. 76
  27. 320
  28. 136
  29. 160
  30. 228
  31. 80
  32. 264
  33. 84
  34. 64
  35. 292
  36. 156
  37. 240
  38. 148
  39. 204
  40. 280

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