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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 580 · 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. 1.19 × 4 =
  2. 2.58 × 4 =
  3. 3.29 × 8 =
  4. 4.46 × 4 =
  5. 5.49 × 4 =
  6. 6.22 × 8 =
  7. 7.16 × 4 =
  8. 8.17 × 4 =
  9. 9.70 × 4 =
  10. 10.35 × 8 =
  11. 11.59 × 4 =
  12. 12.17 × 8 =
  13. 13.54 × 4 =
  14. 14.21 × 8 =
  15. 15.62 × 4 =
  16. 16.37 × 8 =
  17. 17.69 × 4 =
  18. 18.23 × 4 =
  19. 19.38 × 8 =
  20. 20.60 × 4 =
  21. 21.32 × 8 =
  22. 22.20 × 8 =
  23. 23.14 × 8 =
  24. 24.39 × 8 =
  25. 25.26 × 4 =
  26. 26.44 × 4 =
  27. 27.18 × 4 =
  28. 28.26 × 8 =
  29. 29.16 × 8 =
  30. 30.14 × 4 =
  31. 31.15 × 8 =
  32. 32.47 × 4 =
  33. 33.41 × 4 =
  34. 34.13 × 8 =
  35. 35.45 × 4 =
  36. 36.40 × 8 =
  37. 37.48 × 4 =
  38. 38.12 × 4 =
  39. 39.33 × 8 =
  40. 40.71 × 4 =

Answer key

  1. 76
  2. 232
  3. 232
  4. 184
  5. 196
  6. 176
  7. 64
  8. 68
  9. 280
  10. 280
  11. 236
  12. 136
  13. 216
  14. 168
  15. 248
  16. 296
  17. 276
  18. 92
  19. 304
  20. 240
  21. 256
  22. 160
  23. 112
  24. 312
  25. 104
  26. 176
  27. 72
  28. 208
  29. 128
  30. 56
  31. 120
  32. 188
  33. 164
  34. 104
  35. 180
  36. 320
  37. 192
  38. 48
  39. 264
  40. 284

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