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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 122 · 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. 1.26 × 8 =
  2. 2.33 × 8 =
  3. 3.40 × 8 =
  4. 4.17 × 8 =
  5. 5.64 × 4 =
  6. 6.27 × 8 =
  7. 7.69 × 4 =
  8. 8.33 × 4 =
  9. 9.16 × 4 =
  10. 10.29 × 4 =
  11. 11.36 × 8 =
  12. 12.13 × 8 =
  13. 13.37 × 8 =
  14. 14.14 × 8 =
  15. 15.49 × 4 =
  16. 16.30 × 8 =
  17. 17.61 × 4 =
  18. 18.14 × 4 =
  19. 19.18 × 8 =
  20. 20.25 × 4 =
  21. 21.62 × 4 =
  22. 22.37 × 4 =
  23. 23.34 × 8 =
  24. 24.15 × 4 =
  25. 25.19 × 8 =
  26. 26.48 × 4 =
  27. 27.35 × 8 =
  28. 28.45 × 4 =
  29. 29.59 × 4 =
  30. 30.42 × 4 =
  31. 31.38 × 8 =
  32. 32.46 × 4 =
  33. 33.70 × 4 =
  34. 34.57 × 4 =
  35. 35.12 × 8 =
  36. 36.21 × 8 =
  37. 37.17 × 4 =
  38. 38.51 × 4 =
  39. 39.43 × 4 =
  40. 40.75 × 4 =

Answer key

  1. 208
  2. 264
  3. 320
  4. 136
  5. 256
  6. 216
  7. 276
  8. 132
  9. 64
  10. 116
  11. 288
  12. 104
  13. 296
  14. 112
  15. 196
  16. 240
  17. 244
  18. 56
  19. 144
  20. 100
  21. 248
  22. 148
  23. 272
  24. 60
  25. 152
  26. 192
  27. 280
  28. 180
  29. 236
  30. 168
  31. 304
  32. 184
  33. 280
  34. 228
  35. 96
  36. 168
  37. 68
  38. 204
  39. 172
  40. 300

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