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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 134 · 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. 1.31 × 8 =
  2. 2.36 × 4 =
  3. 3.22 × 4 =
  4. 4.15 × 4 =
  5. 5.64 × 4 =
  6. 6.36 × 8 =
  7. 7.20 × 8 =
  8. 8.28 × 4 =
  9. 9.66 × 4 =
  10. 10.17 × 8 =
  11. 11.57 × 4 =
  12. 12.40 × 4 =
  13. 13.23 × 4 =
  14. 14.15 × 8 =
  15. 15.42 × 4 =
  16. 16.56 × 4 =
  17. 17.21 × 8 =
  18. 18.39 × 8 =
  19. 19.73 × 4 =
  20. 20.34 × 8 =
  21. 21.14 × 8 =
  22. 22.19 × 8 =
  23. 23.20 × 4 =
  24. 24.62 × 4 =
  25. 25.24 × 8 =
  26. 26.35 × 8 =
  27. 27.33 × 8 =
  28. 28.27 × 8 =
  29. 29.71 × 4 =
  30. 30.55 × 4 =
  31. 31.27 × 4 =
  32. 32.21 × 4 =
  33. 33.69 × 4 =
  34. 34.61 × 4 =
  35. 35.67 × 4 =
  36. 36.58 × 4 =
  37. 37.47 × 4 =
  38. 38.13 × 8 =
  39. 39.48 × 4 =
  40. 40.30 × 4 =

Answer key

  1. 248
  2. 144
  3. 88
  4. 60
  5. 256
  6. 288
  7. 160
  8. 112
  9. 264
  10. 136
  11. 228
  12. 160
  13. 92
  14. 120
  15. 168
  16. 224
  17. 168
  18. 312
  19. 292
  20. 272
  21. 112
  22. 152
  23. 80
  24. 248
  25. 192
  26. 280
  27. 264
  28. 216
  29. 284
  30. 220
  31. 108
  32. 84
  33. 276
  34. 244
  35. 268
  36. 232
  37. 188
  38. 104
  39. 192
  40. 120

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