能简算的要简算(11分之2乘0.87+0.13*11分之2)\5%(2)(13分之4+15分之7)*13*15
问题描述:
能简算的要简算(11分之2乘0.87+0.13*11分之2)\5%(2)(13分之4+15分之7)*13*15
答
(11分之2乘0.87+0.13*11分之2)\5%
=2/11*(0.87+0.13)*20
=2/11*1*20
=40/11
(13分之4+15分之7)*13*15
=4/13*13*15+7/15*13*15
=4*15+7*13
=60+91
=151
7X+3*0.5=23.7
7x=23.7-1.5
7x=22.2
x=222/10*1/7
x=222/7
6X除以2=210
6x=210*2
6x=420
x=420/6
x=70
0.8:9分之4
=4/5:4/9
=4/5*9/4
=9/5
=1.8