50-(7.5+5)的简便运算
问题描述:
50-(7.5+5)的简便运算
答
50-(7.5+5)=
50-5-5-2.5=
40-2.5=
37.53.7+1.08+2.293.7+1.08+2.29
=3.7+(2.3-0.01)+0.08
=3.7+2.3-0.01+0.08
=6+0.07
=5.93