5.69/4+22/52.25

来源：学生作业帮助网编辑：作业帮时间：2024/05/15 03:47:03

5.6*9/4+22/5*2.25
5.6*9/4+22/5*2.25

5.6*9/4+22/5*2.25
=(28/5)*(9/4)+(22/5)*(9/4)
=(28/5+22/5)*(9/4)
=(50/5)/(9/4)
=10*9/4
=90/4
=22.5

=5.6*(9/4)+(44/10)*(9/4)
=(5.6+4.4)*(9/4)
=90/4
=22.5