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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 78 · 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. 1.22 × 8 =
  2. 2.40 × 8 =
  3. 3.18 × 4 =
  4. 4.24 × 8 =
  5. 5.21 × 8 =
  6. 6.15 × 8 =
  7. 7.37 × 8 =
  8. 8.13 × 8 =
  9. 9.53 × 4 =
  10. 10.12 × 8 =
  11. 11.18 × 8 =
  12. 12.16 × 8 =
  13. 13.32 × 8 =
  14. 14.20 × 8 =
  15. 15.36 × 8 =
  16. 16.14 × 8 =
  17. 17.19 × 4 =
  18. 18.17 × 8 =
  19. 19.39 × 4 =
  20. 20.29 × 8 =
  21. 21.22 × 4 =
  22. 22.46 × 4 =
  23. 23.28 × 4 =
  24. 24.34 × 4 =
  25. 25.74 × 4 =
  26. 26.21 × 4 =
  27. 27.14 × 4 =
  28. 28.27 × 8 =
  29. 29.27 × 4 =
  30. 30.38 × 4 =
  31. 31.58 × 4 =
  32. 32.28 × 8 =
  33. 33.37 × 4 =
  34. 34.25 × 4 =
  35. 35.56 × 4 =
  36. 36.59 × 4 =
  37. 37.38 × 8 =
  38. 38.29 × 4 =
  39. 39.48 × 4 =
  40. 40.47 × 4 =

Answer key

  1. 176
  2. 320
  3. 72
  4. 192
  5. 168
  6. 120
  7. 296
  8. 104
  9. 212
  10. 96
  11. 144
  12. 128
  13. 256
  14. 160
  15. 288
  16. 112
  17. 76
  18. 136
  19. 156
  20. 232
  21. 88
  22. 184
  23. 112
  24. 136
  25. 296
  26. 84
  27. 56
  28. 216
  29. 108
  30. 152
  31. 232
  32. 224
  33. 148
  34. 100
  35. 224
  36. 236
  37. 304
  38. 116
  39. 192
  40. 188

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