问题
解答题
脱式计算
|
答案
(1)1655-45×140÷18,
=1655-6300÷18,
=1655-350,
=1305;
(2)0.63+37%÷(2
+12 3
),4 9
=0.63+37%÷
,37 9
=0.63+
,9 100
=0.72;
(3)
×[4 9
-(3 4
-7 16
)],1 4
=
×[4 9
-3 4
],3 16
=
×4 9
,9 16
=
.1 4