用你喜欢的方法脱式计算．203×45-3780÷35；0.6251×1.8÷4.5+7.5；0.25×0.24×4；910×[78÷﹙45+14﹚]．

Question

用你喜欢的方法脱式计算．
203×45-3780÷35；               
0.6251×1.8÷4.5+7.5；
0.25×0.24×4；               
(9)/(10)×[(7)/(8)÷﹙(4)/(5)+(1)/(4)﹚]．

Answer 1

（1）203×45-3780÷35
=9135-108
=9027；
（2）0.6251×1.8÷4.5+7.5
=0.25004+7.5
=7.75004；
（3）0.25×0.24×4
=0.25×4×0.24
=0.24；
（4）(9)/(10)×[(7)/(8)÷﹙(4)/(5)+(1)/(4)﹚]
=(9)/(10)×[(7)/(8)÷(21)/(20)]
=(9)/(10)×(5)/(6)
=(3)/(4)．