计算下列各题:①-(-25)+(-18)-(-30)+(-26)-4;②(-478)-(-512)+(-414)-(+318);③-23-[34-(112+34-2)-23];④-|-13+(+23)

题目简介

计算下列各题:①-(-25)+(-18)-(-30)+(-26)-4;②(-478)-(-512)+(-414)-(+318);③-23-[34-(112+34-2)-23];④-|-13+(+23)

题目详情

计算下列各题:
①-(-25)+(-18)-(-30)+(-26)-4;
(-4
7
8
)-(-5
1
2
)+(-4
1
4
)-(+3
1
8
)

-
2
3
-[
3
4
-(1
1
2
+
3
4
-2)-
2
3
]

-|-
1
3
+(+
2
3
)|-|-
1
4
|-|-
3
4
|
题型:解答题难度:中档来源:不详

答案

①原式=25-18+30-26-4=55-48=7;
②原式=-4class="stub"7
8
+5class="stub"1
2
-4class="stub"1
4
-3class="stub"1
8
=-4class="stub"7
8
-3class="stub"1
8
+5class="stub"1
2
-4class="stub"1
4
=-8+5class="stub"1
2
-4class="stub"1
4
=-2class="stub"1
2
-4class="stub"1
4
=-6class="stub"3
4

③原式=-class="stub"2
3
-(class="stub"3
4
-1class="stub"1
2
-class="stub"3
4
+2-class="stub"2
3
)=-class="stub"2
3
-class="stub"3
4
+1+class="stub"3
4
-2+class="stub"2
3
=-1;
④原式=-|class="stub"1
3
|-class="stub"1
4
-class="stub"3
4
=-class="stub"1
3
-class="stub"1
4
-class="stub"3
4
=-class="stub"1
3
-1=-class="stub"4
3

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