问题
解答题
计算下列各题
|
答案
(1)2
+11 7
×1 8
+5 9
,3 8
=2
+1 7
+5 8
,3 8
=2
+(1 7
+5 8
),3 8
=2
+1,1 7
=3
;1 7
(2)68×〔1÷(2
-2.09)〕,1 10
=68×〔1÷0.01〕,
=68×100,
=6800;
(3)〔(0.75+
)÷0.25+1 5
〕×250%,2 5
=〔0.95÷0.25+
〕×250%,2 5
=〔3.8+
〕×250%,2 5
=4.2×250%,
=10.5.