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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 20 · 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. 1.30 × 4 =
  2. 2.36 × 8 =
  3. 3.22 × 8 =
  4. 4.33 × 8 =
  5. 5.35 × 8 =
  6. 6.37 × 4 =
  7. 7.27 × 8 =
  8. 8.24 × 4 =
  9. 9.15 × 4 =
  10. 10.26 × 8 =
  11. 11.53 × 4 =
  12. 12.18 × 4 =
  13. 13.35 × 4 =
  14. 14.69 × 4 =
  15. 15.29 × 8 =
  16. 16.40 × 8 =
  17. 17.23 × 4 =
  18. 18.32 × 4 =
  19. 19.75 × 4 =
  20. 20.47 × 4 =
  21. 21.30 × 8 =
  22. 22.16 × 8 =
  23. 23.61 × 4 =
  24. 24.46 × 4 =
  25. 25.33 × 4 =
  26. 26.18 × 8 =
  27. 27.31 × 8 =
  28. 28.20 × 8 =
  29. 29.12 × 8 =
  30. 30.34 × 8 =
  31. 31.13 × 4 =
  32. 32.12 × 4 =
  33. 33.42 × 4 =
  34. 34.28 × 8 =
  35. 35.38 × 8 =
  36. 36.29 × 4 =
  37. 37.73 × 4 =
  38. 38.19 × 8 =
  39. 39.39 × 8 =
  40. 40.14 × 8 =

Answer key

  1. 120
  2. 288
  3. 176
  4. 264
  5. 280
  6. 148
  7. 216
  8. 96
  9. 60
  10. 208
  11. 212
  12. 72
  13. 140
  14. 276
  15. 232
  16. 320
  17. 92
  18. 128
  19. 300
  20. 188
  21. 240
  22. 128
  23. 244
  24. 184
  25. 132
  26. 144
  27. 248
  28. 160
  29. 96
  30. 272
  31. 52
  32. 48
  33. 168
  34. 224
  35. 304
  36. 116
  37. 292
  38. 152
  39. 312
  40. 112

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