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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 167 · 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. 1.36 × 8 =
  2. 2.30 × 4 =
  3. 3.65 × 4 =
  4. 4.38 × 4 =
  5. 5.38 × 8 =
  6. 6.29 × 8 =
  7. 7.15 × 8 =
  8. 8.28 × 8 =
  9. 9.16 × 8 =
  10. 10.27 × 4 =
  11. 11.31 × 4 =
  12. 12.26 × 8 =
  13. 13.20 × 8 =
  14. 14.40 × 4 =
  15. 15.19 × 8 =
  16. 16.12 × 4 =
  17. 17.33 × 8 =
  18. 18.47 × 4 =
  19. 19.36 × 4 =
  20. 20.24 × 8 =
  21. 21.20 × 4 =
  22. 22.15 × 4 =
  23. 23.74 × 4 =
  24. 24.41 × 4 =
  25. 25.48 × 4 =
  26. 26.13 × 4 =
  27. 27.43 × 4 =
  28. 28.28 × 4 =
  29. 29.22 × 4 =
  30. 30.22 × 8 =
  31. 31.25 × 8 =
  32. 32.59 × 4 =
  33. 33.14 × 8 =
  34. 34.18 × 4 =
  35. 35.21 × 8 =
  36. 36.51 × 4 =
  37. 37.31 × 8 =
  38. 38.61 × 4 =
  39. 39.13 × 8 =
  40. 40.33 × 4 =

Answer key

  1. 288
  2. 120
  3. 260
  4. 152
  5. 304
  6. 232
  7. 120
  8. 224
  9. 128
  10. 108
  11. 124
  12. 208
  13. 160
  14. 160
  15. 152
  16. 48
  17. 264
  18. 188
  19. 144
  20. 192
  21. 80
  22. 60
  23. 296
  24. 164
  25. 192
  26. 52
  27. 172
  28. 112
  29. 88
  30. 176
  31. 200
  32. 236
  33. 112
  34. 72
  35. 168
  36. 204
  37. 248
  38. 244
  39. 104
  40. 132

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