3×﹙﹣2分之1﹚的立方-﹙﹣2﹚÷﹙﹣2﹚的平方+﹙﹣2分之1﹚×﹙﹣3﹚÷﹙﹣2分之1﹚
问题描述:
3×﹙﹣2分之1﹚的立方-﹙﹣2﹚÷﹙﹣2﹚的平方+﹙﹣2分之1﹚×﹙﹣3﹚÷﹙﹣2分之1﹚
答
3×(-1/2)³-﹙﹣2﹚÷﹙﹣2﹚²+﹙﹣1/2﹚×﹙﹣3﹚÷﹙﹣1/2﹚
=-3/8+1/2-3
=-23/8
答
3×﹙﹣2分之1﹚的立方-﹙﹣2﹚÷﹙﹣2﹚的平方+﹙﹣2分之1﹚×﹙﹣3﹚÷﹙﹣2分之1﹚
=3×(-1/8)+2÷4+3/2÷(-1/2)
=-3/8+1/2-3
=-2又7/8