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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 100 · 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. 1.15 × 8 =
  2. 2.47 × 4 =
  3. 3.22 × 4 =
  4. 4.12 × 8 =
  5. 5.16 × 4 =
  6. 6.71 × 4 =
  7. 7.31 × 8 =
  8. 8.32 × 8 =
  9. 9.57 × 4 =
  10. 10.38 × 8 =
  11. 11.18 × 8 =
  12. 12.14 × 8 =
  13. 13.14 × 4 =
  14. 14.21 × 8 =
  15. 15.38 × 4 =
  16. 16.26 × 8 =
  17. 17.43 × 4 =
  18. 18.19 × 4 =
  19. 19.25 × 4 =
  20. 20.13 × 8 =
  21. 21.37 × 8 =
  22. 22.24 × 8 =
  23. 23.19 × 8 =
  24. 24.33 × 4 =
  25. 25.44 × 4 =
  26. 26.36 × 8 =
  27. 27.54 × 4 =
  28. 28.13 × 4 =
  29. 29.20 × 8 =
  30. 30.25 × 8 =
  31. 31.17 × 8 =
  32. 32.50 × 4 =
  33. 33.29 × 4 =
  34. 34.28 × 4 =
  35. 35.22 × 8 =
  36. 36.45 × 4 =
  37. 37.34 × 8 =
  38. 38.41 × 4 =
  39. 39.60 × 4 =
  40. 40.37 × 4 =

Answer key

  1. 120
  2. 188
  3. 88
  4. 96
  5. 64
  6. 284
  7. 248
  8. 256
  9. 228
  10. 304
  11. 144
  12. 112
  13. 56
  14. 168
  15. 152
  16. 208
  17. 172
  18. 76
  19. 100
  20. 104
  21. 296
  22. 192
  23. 152
  24. 132
  25. 176
  26. 288
  27. 216
  28. 52
  29. 160
  30. 200
  31. 136
  32. 200
  33. 116
  34. 112
  35. 176
  36. 180
  37. 272
  38. 164
  39. 240
  40. 148

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