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﹚].
问题描述:
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
答
(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