计算:①(-312)-(-4.3)-|-1.7|②12+(-23)-(-43)+(-12)③-35×(-2)×(-56)④8÷(-43)×(-34)⑤(-48)×(-23+38-56)⑥(-78)÷(

题目简介

计算:①(-312)-(-4.3)-|-1.7|②12+(-23)-(-43)+(-12)③-35×(-2)×(-56)④8÷(-43)×(-34)⑤(-48)×(-23+38-56)⑥(-78)÷(

题目详情

计算:
①(-3
1
2
)-(-4.3)-|-1.7|
1
2
+(-
2
3
)-(-
4
3
)+(-
1
2

③-
3
5
×(-2)×(-
5
6

④8÷(-
4
3
)×(-
3
4

⑤(-48)×(-
2
3
+
3
8
-
5
6

⑥(-
7
8
)÷(
3
4
-
7
8

⑦-|-1
1
3
|×(
1
4
-
1
2
)+
2
3
÷(-
1
2

⑧-14+(
1
3
-
1
2
2÷
1
12
+(-1)×(-2)2
题型:解答题难度:中档来源:不详

答案

①原式=-3class="stub"1
2
+4.3-1.7=-2class="stub"1
2

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

③原式=-class="stub"3
5
×2×class="stub"5
6
=-1;
④原式=8×(-class="stub"3
4
)×(-class="stub"3
4
)=class="stub"9
2

⑤原式=32-18+40=54;
⑥原式=-class="stub"7
8
÷(-class="stub"1
8
)=class="stub"7
8
×8=7;
⑦原式=-class="stub"4
3
×(-class="stub"1
4
)+class="stub"2
3
×(-2)=class="stub"1
3
-class="stub"4
3
=-1;
⑧原式=-1+class="stub"1
36
×12-4=-5+class="stub"1
3
=-4class="stub"2
3

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