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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 95 · 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. 1.22 × 8 =
  2. 2.36 × 8 =
  3. 3.45 × 4 =
  4. 4.60 × 4 =
  5. 5.50 × 4 =
  6. 6.40 × 8 =
  7. 7.72 × 4 =
  8. 8.73 × 4 =
  9. 9.30 × 8 =
  10. 10.14 × 4 =
  11. 11.42 × 4 =
  12. 12.31 × 4 =
  13. 13.36 × 4 =
  14. 14.53 × 4 =
  15. 15.74 × 4 =
  16. 16.16 × 8 =
  17. 17.31 × 8 =
  18. 18.35 × 4 =
  19. 19.17 × 8 =
  20. 20.37 × 8 =
  21. 21.23 × 4 =
  22. 22.15 × 8 =
  23. 23.70 × 4 =
  24. 24.15 × 4 =
  25. 25.67 × 4 =
  26. 26.28 × 4 =
  27. 27.28 × 8 =
  28. 28.18 × 8 =
  29. 29.61 × 4 =
  30. 30.12 × 8 =
  31. 31.55 × 4 =
  32. 32.21 × 8 =
  33. 33.65 × 4 =
  34. 34.24 × 8 =
  35. 35.26 × 4 =
  36. 36.33 × 4 =
  37. 37.39 × 8 =
  38. 38.19 × 8 =
  39. 39.71 × 4 =
  40. 40.24 × 4 =

Answer key

  1. 176
  2. 288
  3. 180
  4. 240
  5. 200
  6. 320
  7. 288
  8. 292
  9. 240
  10. 56
  11. 168
  12. 124
  13. 144
  14. 212
  15. 296
  16. 128
  17. 248
  18. 140
  19. 136
  20. 296
  21. 92
  22. 120
  23. 280
  24. 60
  25. 268
  26. 112
  27. 224
  28. 144
  29. 244
  30. 96
  31. 220
  32. 168
  33. 260
  34. 192
  35. 104
  36. 132
  37. 312
  38. 152
  39. 284
  40. 96

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