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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 126 · 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. 1.14 × 8 =
  2. 2.14 × 4 =
  3. 3.17 × 8 =
  4. 4.17 × 4 =
  5. 5.71 × 4 =
  6. 6.42 × 4 =
  7. 7.13 × 8 =
  8. 8.22 × 4 =
  9. 9.36 × 4 =
  10. 10.24 × 8 =
  11. 11.19 × 8 =
  12. 12.31 × 8 =
  13. 13.37 × 8 =
  14. 14.29 × 8 =
  15. 15.29 × 4 =
  16. 16.23 × 4 =
  17. 17.26 × 4 =
  18. 18.30 × 8 =
  19. 19.67 × 4 =
  20. 20.19 × 4 =
  21. 21.26 × 8 =
  22. 22.38 × 8 =
  23. 23.15 × 8 =
  24. 24.56 × 4 =
  25. 25.22 × 8 =
  26. 26.59 × 4 =
  27. 27.18 × 8 =
  28. 28.72 × 4 =
  29. 29.13 × 4 =
  30. 30.37 × 4 =
  31. 31.28 × 8 =
  32. 32.60 × 4 =
  33. 33.75 × 4 =
  34. 34.27 × 8 =
  35. 35.25 × 4 =
  36. 36.21 × 4 =
  37. 37.40 × 4 =
  38. 38.32 × 8 =
  39. 39.33 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 112
  2. 56
  3. 136
  4. 68
  5. 284
  6. 168
  7. 104
  8. 88
  9. 144
  10. 192
  11. 152
  12. 248
  13. 296
  14. 232
  15. 116
  16. 92
  17. 104
  18. 240
  19. 268
  20. 76
  21. 208
  22. 304
  23. 120
  24. 224
  25. 176
  26. 236
  27. 144
  28. 288
  29. 52
  30. 148
  31. 224
  32. 240
  33. 300
  34. 216
  35. 100
  36. 84
  37. 160
  38. 256
  39. 264
  40. 288

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