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
答
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(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