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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 180 · 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. 2.55 × 4 =
  3. 3.24 × 4 =
  4. 4.28 × 4 =
  5. 5.30 × 4 =
  6. 6.15 × 4 =
  7. 7.38 × 8 =
  8. 8.35 × 4 =
  9. 9.25 × 4 =
  10. 10.21 × 8 =
  11. 11.18 × 8 =
  12. 12.16 × 4 =
  13. 13.27 × 8 =
  14. 14.35 × 8 =
  15. 15.33 × 8 =
  16. 16.29 × 8 =
  17. 17.41 × 4 =
  18. 18.57 × 4 =
  19. 19.31 × 8 =
  20. 20.36 × 8 =
  21. 21.18 × 4 =
  22. 22.32 × 4 =
  23. 23.67 × 4 =
  24. 24.49 × 4 =
  25. 25.13 × 8 =
  26. 26.59 × 4 =
  27. 27.60 × 4 =
  28. 28.42 × 4 =
  29. 29.61 × 4 =
  30. 30.58 × 4 =
  31. 31.47 × 4 =
  32. 32.31 × 4 =
  33. 33.40 × 8 =
  34. 34.21 × 4 =
  35. 35.30 × 8 =
  36. 36.64 × 4 =
  37. 37.72 × 4 =
  38. 38.29 × 4 =
  39. 39.39 × 8 =
  40. 40.63 × 4 =

Answer key

  1. 112
  2. 220
  3. 96
  4. 112
  5. 120
  6. 60
  7. 304
  8. 140
  9. 100
  10. 168
  11. 144
  12. 64
  13. 216
  14. 280
  15. 264
  16. 232
  17. 164
  18. 228
  19. 248
  20. 288
  21. 72
  22. 128
  23. 268
  24. 196
  25. 104
  26. 236
  27. 240
  28. 168
  29. 244
  30. 232
  31. 188
  32. 124
  33. 320
  34. 84
  35. 240
  36. 256
  37. 288
  38. 116
  39. 312
  40. 252

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