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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 108 · 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. 1.26 × 8 =
  2. 2.14 × 4 =
  3. 3.32 × 4 =
  4. 4.38 × 4 =
  5. 5.17 × 4 =
  6. 6.13 × 8 =
  7. 7.28 × 4 =
  8. 8.57 × 4 =
  9. 9.33 × 8 =
  10. 10.31 × 4 =
  11. 11.18 × 4 =
  12. 12.14 × 8 =
  13. 13.34 × 8 =
  14. 14.24 × 4 =
  15. 15.15 × 8 =
  16. 16.20 × 4 =
  17. 17.72 × 4 =
  18. 18.49 × 4 =
  19. 19.21 × 4 =
  20. 20.21 × 8 =
  21. 21.13 × 4 =
  22. 22.36 × 4 =
  23. 23.29 × 8 =
  24. 24.17 × 8 =
  25. 25.71 × 4 =
  26. 26.29 × 4 =
  27. 27.24 × 8 =
  28. 28.61 × 4 =
  29. 29.73 × 4 =
  30. 30.28 × 8 =
  31. 31.68 × 4 =
  32. 32.31 × 8 =
  33. 33.36 × 8 =
  34. 34.55 × 4 =
  35. 35.12 × 4 =
  36. 36.62 × 4 =
  37. 37.39 × 8 =
  38. 38.23 × 8 =
  39. 39.58 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 208
  2. 56
  3. 128
  4. 152
  5. 68
  6. 104
  7. 112
  8. 228
  9. 264
  10. 124
  11. 72
  12. 112
  13. 272
  14. 96
  15. 120
  16. 80
  17. 288
  18. 196
  19. 84
  20. 168
  21. 52
  22. 144
  23. 232
  24. 136
  25. 284
  26. 116
  27. 192
  28. 244
  29. 292
  30. 224
  31. 272
  32. 248
  33. 288
  34. 220
  35. 48
  36. 248
  37. 312
  38. 184
  39. 232
  40. 140

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