问题
解答题
计算.
|
答案
(1)(253-159)×(27÷9),
=94×3,
=282;
(2)6.8+2.37+7.63+4.2,
=(6.8+4.2)+(2.37+7.63),
=11+10,
=21;
(3)11-
-1 3
,2 3
=11-(
+1 3
),2 3
=11-1,
=10;
(4)
÷[(5 8
+1 2
)×2 3
],4 7
=
÷[5 8
×7 6
],4 7
=
÷5 8
,2 3
=
;15 16
(5)0.6×(5.3-1.7)÷0.9,
=0.6×3.6÷0.9,
=2.16÷0.9,
=2.4.