百分数数学题(能简算要简算)

问题描述:

百分数数学题(能简算要简算)
①(3/7+2/3-10%)×21 3/5×53%+60%×0.47 ③3/4-(20%+1/3)×4.5

①(3/7+2/3-10%)×21 =3*3+2*7-2.1=20.9 (2)3/5×53%+60%×0.47 =60%(53%+47%) =60%=0.6 ③3/4-(20%+1/3)×4.5=3/4-(0.9+1.5)=0.75-2.4=-1.65看不懂,你告诉哪个是可以简算的就可以了

  1. ①(3/7+2/3-10%)×21
  2. =3*3+2*7-2.1
  3. =20.9
  4. (2)3/5×53%+60%×0.47
  5. =60%(53%+47%)
  6. =60%=0.6
  7. ③3/4-(20%+1/3)×4.5
  8. =3/4-(0.9+1.5)
  9. =0.75-2.4
  10. =-1.65