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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 768 · 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. 1.52 × 4 =
  2. 2.60 × 4 =
  3. 3.12 × 8 =
  4. 4.72 × 4 =
  5. 5.66 × 4 =
  6. 6.23 × 4 =
  7. 7.30 × 4 =
  8. 8.15 × 4 =
  9. 9.17 × 8 =
  10. 10.44 × 4 =
  11. 11.57 × 4 =
  12. 12.30 × 8 =
  13. 13.67 × 4 =
  14. 14.18 × 8 =
  15. 15.16 × 8 =
  16. 16.25 × 4 =
  17. 17.21 × 4 =
  18. 18.75 × 4 =
  19. 19.15 × 8 =
  20. 20.13 × 8 =
  21. 21.65 × 4 =
  22. 22.22 × 8 =
  23. 23.28 × 4 =
  24. 24.43 × 4 =
  25. 25.37 × 4 =
  26. 26.22 × 4 =
  27. 27.35 × 8 =
  28. 28.49 × 4 =
  29. 29.20 × 4 =
  30. 30.19 × 8 =
  31. 31.39 × 8 =
  32. 32.14 × 8 =
  33. 33.29 × 4 =
  34. 34.33 × 8 =
  35. 35.14 × 4 =
  36. 36.27 × 4 =
  37. 37.74 × 4 =
  38. 38.31 × 8 =
  39. 39.40 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 208
  2. 240
  3. 96
  4. 288
  5. 264
  6. 92
  7. 120
  8. 60
  9. 136
  10. 176
  11. 228
  12. 240
  13. 268
  14. 144
  15. 128
  16. 100
  17. 84
  18. 300
  19. 120
  20. 104
  21. 260
  22. 176
  23. 112
  24. 172
  25. 148
  26. 88
  27. 280
  28. 196
  29. 80
  30. 152
  31. 312
  32. 112
  33. 116
  34. 264
  35. 56
  36. 108
  37. 296
  38. 248
  39. 160
  40. 184

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