问题
解答题
脱式计算: 5025-2940÷28×7; 3.68×[1÷(2.1-2.09)]; 5-5×
|
答案
5025-2940÷28×7,
=5025-105×7,
=5025-735,
=4290;
3.68×[1÷(2.1-2.09)],
=3.68×[1÷0.01],
=3.68×100,
=368;
5-5×
+2 5
,3 5
=5-2+
,3 5
=3
;3 5
×[(5 11
+2 5
)÷1 3
],5 6
=
×[(5 11
+6 15
)×5 15
],6 5
=
×[5 11
×11 15
],6 5
=
×5 11
,22 25
=
.2 5