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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 501 · 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. 1.42 × 4 =
  2. 2.12 × 8 =
  3. 3.69 × 4 =
  4. 4.45 × 4 =
  5. 5.38 × 8 =
  6. 6.19 × 4 =
  7. 7.29 × 4 =
  8. 8.19 × 8 =
  9. 9.22 × 4 =
  10. 10.46 × 4 =
  11. 11.31 × 8 =
  12. 12.72 × 4 =
  13. 13.16 × 8 =
  14. 14.28 × 4 =
  15. 15.74 × 4 =
  16. 16.65 × 4 =
  17. 17.21 × 8 =
  18. 18.21 × 4 =
  19. 19.27 × 4 =
  20. 20.25 × 8 =
  21. 21.18 × 8 =
  22. 22.34 × 8 =
  23. 23.62 × 4 =
  24. 24.34 × 4 =
  25. 25.26 × 4 =
  26. 26.32 × 8 =
  27. 27.39 × 8 =
  28. 28.22 × 8 =
  29. 29.61 × 4 =
  30. 30.40 × 8 =
  31. 31.38 × 4 =
  32. 32.15 × 8 =
  33. 33.17 × 8 =
  34. 34.12 × 4 =
  35. 35.59 × 4 =
  36. 36.28 × 8 =
  37. 37.15 × 4 =
  38. 38.35 × 8 =
  39. 39.66 × 4 =
  40. 40.52 × 4 =

Answer key

  1. 168
  2. 96
  3. 276
  4. 180
  5. 304
  6. 76
  7. 116
  8. 152
  9. 88
  10. 184
  11. 248
  12. 288
  13. 128
  14. 112
  15. 296
  16. 260
  17. 168
  18. 84
  19. 108
  20. 200
  21. 144
  22. 272
  23. 248
  24. 136
  25. 104
  26. 256
  27. 312
  28. 176
  29. 244
  30. 320
  31. 152
  32. 120
  33. 136
  34. 48
  35. 236
  36. 224
  37. 60
  38. 280
  39. 264
  40. 208

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