(-3.6)+(+2.7)+(-0.4)+2有8分之7+(+13)+(1又8分之7)

问题描述:

(-3.6)+(+2.7)+(-0.4)+2有8分之7+(+13)+(1又8分之7)

原式=-3.6+2.7-0.4+8分之23+13+8分之15
=13+2.7-(3.6+0.4)+8分之38
=15.7-4+8分之38
=11.7+8分之38
=11.7+4.75
=16.45