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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 58 · 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. 1.25 × 8 =
  2. 2.46 × 4 =
  3. 3.56 × 4 =
  4. 4.75 × 4 =
  5. 5.55 × 4 =
  6. 6.38 × 4 =
  7. 7.49 × 4 =
  8. 8.16 × 8 =
  9. 9.42 × 4 =
  10. 10.34 × 8 =
  11. 11.22 × 4 =
  12. 12.30 × 4 =
  13. 13.54 × 4 =
  14. 14.63 × 4 =
  15. 15.47 × 4 =
  16. 16.58 × 4 =
  17. 17.35 × 8 =
  18. 18.14 × 8 =
  19. 19.31 × 8 =
  20. 20.67 × 4 =
  21. 21.21 × 8 =
  22. 22.14 × 4 =
  23. 23.28 × 8 =
  24. 24.13 × 4 =
  25. 25.68 × 4 =
  26. 26.15 × 8 =
  27. 27.24 × 4 =
  28. 28.36 × 8 =
  29. 29.19 × 4 =
  30. 30.15 × 4 =
  31. 31.28 × 4 =
  32. 32.23 × 8 =
  33. 33.37 × 8 =
  34. 34.12 × 8 =
  35. 35.12 × 4 =
  36. 36.51 × 4 =
  37. 37.22 × 8 =
  38. 38.27 × 4 =
  39. 39.40 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 200
  2. 184
  3. 224
  4. 300
  5. 220
  6. 152
  7. 196
  8. 128
  9. 168
  10. 272
  11. 88
  12. 120
  13. 216
  14. 252
  15. 188
  16. 232
  17. 280
  18. 112
  19. 248
  20. 268
  21. 168
  22. 56
  23. 224
  24. 52
  25. 272
  26. 120
  27. 96
  28. 288
  29. 76
  30. 60
  31. 112
  32. 184
  33. 296
  34. 96
  35. 48
  36. 204
  37. 176
  38. 108
  39. 160
  40. 292

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