题打错了还是,如果没打错那就没法简算……
如果两个都是16.5:
解:16.5×7/5+16.5÷(5/18)
=16.5×7/5+16.5×18/5
=16.5×(7/5+18/5)
=16.5×5
=82.5
如果两个都是16.7:
解:16.7×7/5+16.7÷(5/18)
=16.7×7/5+16.7×18/5
=16.7×(7/5+18/5)
=16.7×5
=83.5