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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 904 · 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. 1.18 × 8 =
  2. 2.13 × 8 =
  3. 3.35 × 8 =
  4. 4.29 × 4 =
  5. 5.24 × 8 =
  6. 6.26 × 4 =
  7. 7.38 × 8 =
  8. 8.33 × 4 =
  9. 9.32 × 8 =
  10. 10.20 × 4 =
  11. 11.65 × 4 =
  12. 12.31 × 8 =
  13. 13.53 × 4 =
  14. 14.27 × 8 =
  15. 15.51 × 4 =
  16. 16.75 × 4 =
  17. 17.22 × 8 =
  18. 18.27 × 4 =
  19. 19.13 × 4 =
  20. 20.12 × 8 =
  21. 21.20 × 8 =
  22. 22.48 × 4 =
  23. 23.23 × 8 =
  24. 24.15 × 4 =
  25. 25.23 × 4 =
  26. 26.36 × 4 =
  27. 27.40 × 8 =
  28. 28.44 × 4 =
  29. 29.43 × 4 =
  30. 30.52 × 4 =
  31. 31.35 × 4 =
  32. 32.49 × 4 =
  33. 33.16 × 8 =
  34. 34.19 × 8 =
  35. 35.17 × 8 =
  36. 36.67 × 4 =
  37. 37.69 × 4 =
  38. 38.58 × 4 =
  39. 39.37 × 4 =
  40. 40.29 × 8 =

Answer key

  1. 144
  2. 104
  3. 280
  4. 116
  5. 192
  6. 104
  7. 304
  8. 132
  9. 256
  10. 80
  11. 260
  12. 248
  13. 212
  14. 216
  15. 204
  16. 300
  17. 176
  18. 108
  19. 52
  20. 96
  21. 160
  22. 192
  23. 184
  24. 60
  25. 92
  26. 144
  27. 320
  28. 176
  29. 172
  30. 208
  31. 140
  32. 196
  33. 128
  34. 152
  35. 136
  36. 268
  37. 276
  38. 232
  39. 148
  40. 232

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