脱式计算（能简算的要简算）5+0.45÷0.9-1.7575.36-24.9+24.64-25.171×40%+28×25+0.41÷〔（734+0.25）×0.125-12〕

Question

脱式计算（能简算的要简算）

5+0.45÷0.9-1.75	75.36-24.9+24.64-25.1
71×40%+28×(2)/(5)+0.4	1÷〔（7(3)/(4)+0.25）×0.125-(1)/(2)〕

Answer 1

（1）5+0.45÷0.9-1.75，
=5+0.5-1.75，
=3.75；

（2）75.36-24.9+24.64-25.1，
=（75.36+24.64）-（24.9+25.1），
=100-50，
=50；

（3）71×40%+28×(2)/(5)+0.4，
=71×0.4+28×0.4+0.4，
=（71+28+1）×0.4，
=100×0.4，
=40；

（4）1÷[（7(3)/(4)+0.25）×0.125-(1)/(2)]，
=1÷[（7.75+0.25）×0.125-0.5]，
=1÷[8×0.125-0.5]，
=1÷0.5，
=2．