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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 702 · 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. 1.14 × 8 =
  2. 2.20 × 4 =
  3. 3.21 × 8 =
  4. 4.13 × 8 =
  5. 5.68 × 4 =
  6. 6.59 × 4 =
  7. 7.14 × 4 =
  8. 8.58 × 4 =
  9. 9.22 × 8 =
  10. 10.20 × 8 =
  11. 11.62 × 4 =
  12. 12.37 × 8 =
  13. 13.28 × 4 =
  14. 14.43 × 4 =
  15. 15.48 × 4 =
  16. 16.32 × 4 =
  17. 17.45 × 4 =
  18. 18.17 × 8 =
  19. 19.34 × 4 =
  20. 20.29 × 8 =
  21. 21.29 × 4 =
  22. 22.23 × 8 =
  23. 23.26 × 8 =
  24. 24.44 × 4 =
  25. 25.40 × 8 =
  26. 26.72 × 4 =
  27. 27.50 × 4 =
  28. 28.51 × 4 =
  29. 29.27 × 8 =
  30. 30.21 × 4 =
  31. 31.19 × 8 =
  32. 32.24 × 4 =
  33. 33.38 × 8 =
  34. 34.35 × 4 =
  35. 35.26 × 4 =
  36. 36.38 × 4 =
  37. 37.30 × 8 =
  38. 38.64 × 4 =
  39. 39.12 × 4 =
  40. 40.31 × 8 =

Answer key

  1. 112
  2. 80
  3. 168
  4. 104
  5. 272
  6. 236
  7. 56
  8. 232
  9. 176
  10. 160
  11. 248
  12. 296
  13. 112
  14. 172
  15. 192
  16. 128
  17. 180
  18. 136
  19. 136
  20. 232
  21. 116
  22. 184
  23. 208
  24. 176
  25. 320
  26. 288
  27. 200
  28. 204
  29. 216
  30. 84
  31. 152
  32. 96
  33. 304
  34. 140
  35. 104
  36. 152
  37. 240
  38. 256
  39. 48
  40. 248

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