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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 181 · 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. 1.27 × 8 =
  2. 2.33 × 8 =
  3. 3.65 × 4 =
  4. 4.42 × 4 =
  5. 5.35 × 4 =
  6. 6.22 × 4 =
  7. 7.19 × 8 =
  8. 8.34 × 4 =
  9. 9.31 × 8 =
  10. 10.16 × 4 =
  11. 11.24 × 4 =
  12. 12.23 × 4 =
  13. 13.47 × 4 =
  14. 14.58 × 4 =
  15. 15.60 × 4 =
  16. 16.19 × 4 =
  17. 17.16 × 8 =
  18. 18.71 × 4 =
  19. 19.49 × 4 =
  20. 20.31 × 4 =
  21. 21.29 × 4 =
  22. 22.73 × 4 =
  23. 23.37 × 8 =
  24. 24.36 × 8 =
  25. 25.69 × 4 =
  26. 26.14 × 8 =
  27. 27.66 × 4 =
  28. 28.25 × 8 =
  29. 29.28 × 4 =
  30. 30.15 × 8 =
  31. 31.12 × 4 =
  32. 32.32 × 8 =
  33. 33.59 × 4 =
  34. 34.27 × 4 =
  35. 35.57 × 4 =
  36. 36.38 × 8 =
  37. 37.13 × 8 =
  38. 38.48 × 4 =
  39. 39.25 × 4 =
  40. 40.41 × 4 =

Answer key

  1. 216
  2. 264
  3. 260
  4. 168
  5. 140
  6. 88
  7. 152
  8. 136
  9. 248
  10. 64
  11. 96
  12. 92
  13. 188
  14. 232
  15. 240
  16. 76
  17. 128
  18. 284
  19. 196
  20. 124
  21. 116
  22. 292
  23. 296
  24. 288
  25. 276
  26. 112
  27. 264
  28. 200
  29. 112
  30. 120
  31. 48
  32. 256
  33. 236
  34. 108
  35. 228
  36. 304
  37. 104
  38. 192
  39. 100
  40. 164

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