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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 747 · 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. 1.37 × 8 =
  2. 2.70 × 4 =
  3. 3.19 × 4 =
  4. 4.41 × 4 =
  5. 5.22 × 4 =
  6. 6.33 × 8 =
  7. 7.60 × 4 =
  8. 8.73 × 4 =
  9. 9.23 × 4 =
  10. 10.32 × 8 =
  11. 11.69 × 4 =
  12. 12.48 × 4 =
  13. 13.22 × 8 =
  14. 14.55 × 4 =
  15. 15.21 × 8 =
  16. 16.14 × 8 =
  17. 17.64 × 4 =
  18. 18.12 × 8 =
  19. 19.42 × 4 =
  20. 20.54 × 4 =
  21. 21.40 × 8 =
  22. 22.15 × 4 =
  23. 23.61 × 4 =
  24. 24.23 × 8 =
  25. 25.26 × 8 =
  26. 26.39 × 4 =
  27. 27.29 × 8 =
  28. 28.28 × 8 =
  29. 29.26 × 4 =
  30. 30.28 × 4 =
  31. 31.65 × 4 =
  32. 32.16 × 8 =
  33. 33.47 × 4 =
  34. 34.38 × 4 =
  35. 35.36 × 4 =
  36. 36.17 × 8 =
  37. 37.35 × 8 =
  38. 38.62 × 4 =
  39. 39.59 × 4 =
  40. 40.16 × 4 =

Answer key

  1. 296
  2. 280
  3. 76
  4. 164
  5. 88
  6. 264
  7. 240
  8. 292
  9. 92
  10. 256
  11. 276
  12. 192
  13. 176
  14. 220
  15. 168
  16. 112
  17. 256
  18. 96
  19. 168
  20. 216
  21. 320
  22. 60
  23. 244
  24. 184
  25. 208
  26. 156
  27. 232
  28. 224
  29. 104
  30. 112
  31. 260
  32. 128
  33. 188
  34. 152
  35. 144
  36. 136
  37. 280
  38. 248
  39. 236
  40. 64

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