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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 351 · 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. 1.12 × 4 =
  2. 2.14 × 4 =
  3. 3.25 × 8 =
  4. 4.36 × 8 =
  5. 5.31 × 4 =
  6. 6.29 × 8 =
  7. 7.15 × 8 =
  8. 8.12 × 8 =
  9. 9.26 × 8 =
  10. 10.33 × 8 =
  11. 11.29 × 4 =
  12. 12.61 × 4 =
  13. 13.14 × 8 =
  14. 14.47 × 4 =
  15. 15.63 × 4 =
  16. 16.57 × 4 =
  17. 17.70 × 4 =
  18. 18.13 × 8 =
  19. 19.35 × 8 =
  20. 20.69 × 4 =
  21. 21.17 × 4 =
  22. 22.28 × 4 =
  23. 23.19 × 8 =
  24. 24.31 × 8 =
  25. 25.45 × 4 =
  26. 26.17 × 8 =
  27. 27.38 × 4 =
  28. 28.39 × 8 =
  29. 29.34 × 4 =
  30. 30.27 × 8 =
  31. 31.43 × 4 =
  32. 32.28 × 8 =
  33. 33.37 × 4 =
  34. 34.18 × 8 =
  35. 35.54 × 4 =
  36. 36.30 × 4 =
  37. 37.15 × 4 =
  38. 38.23 × 4 =
  39. 39.23 × 8 =
  40. 40.34 × 8 =

Answer key

  1. 48
  2. 56
  3. 200
  4. 288
  5. 124
  6. 232
  7. 120
  8. 96
  9. 208
  10. 264
  11. 116
  12. 244
  13. 112
  14. 188
  15. 252
  16. 228
  17. 280
  18. 104
  19. 280
  20. 276
  21. 68
  22. 112
  23. 152
  24. 248
  25. 180
  26. 136
  27. 152
  28. 312
  29. 136
  30. 216
  31. 172
  32. 224
  33. 148
  34. 144
  35. 216
  36. 120
  37. 60
  38. 92
  39. 184
  40. 272

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