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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 19 · 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. 1.61 × 4 =
  2. 2.70 × 4 =
  3. 3.38 × 8 =
  4. 4.39 × 8 =
  5. 5.23 × 4 =
  6. 6.34 × 8 =
  7. 7.25 × 8 =
  8. 8.18 × 4 =
  9. 9.15 × 8 =
  10. 10.21 × 8 =
  11. 11.13 × 8 =
  12. 12.33 × 4 =
  13. 13.28 × 8 =
  14. 14.28 × 4 =
  15. 15.48 × 4 =
  16. 16.32 × 4 =
  17. 17.43 × 4 =
  18. 18.52 × 4 =
  19. 19.59 × 4 =
  20. 20.38 × 4 =
  21. 21.26 × 4 =
  22. 22.15 × 4 =
  23. 23.45 × 4 =
  24. 24.69 × 4 =
  25. 25.55 × 4 =
  26. 26.39 × 4 =
  27. 27.36 × 8 =
  28. 28.68 × 4 =
  29. 29.25 × 4 =
  30. 30.19 × 4 =
  31. 31.44 × 4 =
  32. 32.23 × 8 =
  33. 33.29 × 8 =
  34. 34.42 × 4 =
  35. 35.14 × 8 =
  36. 36.71 × 4 =
  37. 37.20 × 4 =
  38. 38.30 × 8 =
  39. 39.34 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 244
  2. 280
  3. 304
  4. 312
  5. 92
  6. 272
  7. 200
  8. 72
  9. 120
  10. 168
  11. 104
  12. 132
  13. 224
  14. 112
  15. 192
  16. 128
  17. 172
  18. 208
  19. 236
  20. 152
  21. 104
  22. 60
  23. 180
  24. 276
  25. 220
  26. 156
  27. 288
  28. 272
  29. 100
  30. 76
  31. 176
  32. 184
  33. 232
  34. 168
  35. 112
  36. 284
  37. 80
  38. 240
  39. 136
  40. 232

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