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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 94 · 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. 1.22 × 8 =
  2. 2.14 × 8 =
  3. 3.67 × 4 =
  4. 4.75 × 4 =
  5. 5.15 × 4 =
  6. 6.13 × 8 =
  7. 7.34 × 8 =
  8. 8.54 × 4 =
  9. 9.16 × 8 =
  10. 10.17 × 4 =
  11. 11.39 × 4 =
  12. 12.29 × 8 =
  13. 13.24 × 4 =
  14. 14.30 × 8 =
  15. 15.21 × 4 =
  16. 16.48 × 4 =
  17. 17.49 × 4 =
  18. 18.69 × 4 =
  19. 19.66 × 4 =
  20. 20.23 × 8 =
  21. 21.31 × 8 =
  22. 22.37 × 8 =
  23. 23.12 × 4 =
  24. 24.52 × 4 =
  25. 25.61 × 4 =
  26. 26.18 × 8 =
  27. 27.32 × 4 =
  28. 28.13 × 4 =
  29. 29.38 × 8 =
  30. 30.73 × 4 =
  31. 31.25 × 4 =
  32. 32.14 × 4 =
  33. 33.57 × 4 =
  34. 34.26 × 8 =
  35. 35.72 × 4 =
  36. 36.24 × 8 =
  37. 37.12 × 8 =
  38. 38.30 × 4 =
  39. 39.65 × 4 =
  40. 40.51 × 4 =

Answer key

  1. 176
  2. 112
  3. 268
  4. 300
  5. 60
  6. 104
  7. 272
  8. 216
  9. 128
  10. 68
  11. 156
  12. 232
  13. 96
  14. 240
  15. 84
  16. 192
  17. 196
  18. 276
  19. 264
  20. 184
  21. 248
  22. 296
  23. 48
  24. 208
  25. 244
  26. 144
  27. 128
  28. 52
  29. 304
  30. 292
  31. 100
  32. 56
  33. 228
  34. 208
  35. 288
  36. 192
  37. 96
  38. 120
  39. 260
  40. 204

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