简算4道题.
问题描述:
简算4道题.
3.5×5/4+1.25+3/2÷4/5 12.5×﹙36-36/5﹚÷3.6 20/3÷﹙22/5-56/15﹚×0.9 ﹙5/25+5/25×3﹚×0.25
答
3.5×5/4+1.25+3/2÷4/5 =3.5×5/4+1.25+1.5×5/4=5/4×(3.5+1.5)+1.25=6.25+1.25=7.512.5×﹙36-36/5﹚÷3.6 =12.5×(1-1/5)×36÷3.6=12.5×4/5×10=12.5×8=10020/3÷﹙22/5-56/15﹚×0.9 =20/3÷[1/5...