简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/07 05:12:18
简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25

简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25
简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25

简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25
9.42*10-94.2*0.9
=94.2-94.2*0.9
=94.2*(1-0.9)
=94.2*0.1
=9.42
3.61/(7.2-5.3)*25
=3.61/1.9*25
=1.9*25
=(2-0.1)*25
=2*25-0.1*25
=50-2.5
=47.5

2.4*1.5+3.6/1.5
=2.4*1.5+2.4
=2.4*2.5
=0.6x4x2.5
=6