(1)179×[(38+0.25)÷(56-59)](2)[11.9-3.4×(10.802-9.802)]÷85%(3)10÷25+212×0.4-125(4)(825-10.5×45)×(316+

题目简介

(1)179×[(38+0.25)÷(56-59)](2)[11.9-3.4×(10.802-9.802)]÷85%(3)10÷25+212×0.4-125(4)(825-10.5×45)×(316+

题目详情

(1)1
7
9
×[(
3
8
+0.25)÷(
5
6
-
5
9
)]

(2)[11.9-3.4×(10.802-9.802)]÷85%
(3)10÷25+2
1
2
×0.4-1
2
5

(4)(8
2
5
-10.5×
4
5
)×(3
1
6
+7.5)
题型:解答题难度:中档来源:尤溪县模拟

答案

(1)1class="stub"7
9
×[(class="stub"3
8
+0.25)÷(class="stub"5
6
-class="stub"5
9
)]

=1class="stub"7
9
×[(class="stub"3
8
+class="stub"1
4
)÷(class="stub"15
18
-class="stub"10
18
)],
=1class="stub"7
9
×[class="stub"5
8
÷class="stub"5
18
],
=1class="stub"7
9
×class="stub"9
4

=4;
(2)[11.9-3.4×(10.802-9.802)]÷85%,
=[11.9-3.4×1]÷0.85,
=[11.9-3.4]÷0.85,
=8.5÷0.85,
=10;
(3)10÷25+2class="stub"1
2
×0.4-1class="stub"2
5

=0.4+2.5×0.4-1.4,
=0.4+1-1.4,
=1.4-1.4,
=0;
(4)(8class="stub"2
5
-10.5×class="stub"4
5
)×(3class="stub"1
6
+7.5)

=(8class="stub"2
5
-8.4)×(3class="stub"1
6
+7class="stub"1
2
),
=0×10class="stub"2
3

=0.

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