1.(4/3+15/13)*60/1 2.106*16/1+54/16 3.9*9/1*9*9/1 4.(8/7-16/5)

问题描述:

1.(4/3+15/13)*60/1 2.106*16/1+54/16 3.9*9/1*9*9/1 4.(8/7-16/5)

1.(4/3+15/13)÷60/1
=4/3×60+15/13×60
=45+52
=97
2.106*16/1+54/16
=(106+54)/16
=160/16
=10
3.9*9/1*9*9/1
=(9×9/1)×(9×9/1)
=1×1
=1
4.(8/7-16/5)
=16/14-16/5
=16/5