计算下列各题(1)56÷23-13×(-9)2+32(2)(-24)×(112-16+38)(3)3.14×6.49+3.14×(-5.49)-9×(-3.14...

2023-07-08 09:12发布

这道初中数学的题目是:
计算下列各题
(1)
5
6
÷
2
3
-
1
3
×(-9)2+32

(2)(-24)×(
1
12
-
1
6
+
3
8
)

(3)3.14×6.49+3.14×(-5.49)-9×(-3.14)
(4)(-1
1
2
)
2
-(-
2
3
+
1
2
(-
1
6
)
3
1条回答
克劳馥
2023-07-08 09:29
这道初中数学题的正确答案为:
(1)
5
6
÷
2
3
-
1
3
×(-9)2+32
=
5
6
×
3
2
-
1
3
×81+9,
=
5
4
-27+9,
=-
67
4


(2)(-24)×(
1
12
-
1
6
+
3
8
),
=
1
12
×(-24)-
1
6
×(-24)+
3
8
×(-24),
=-2+4-9,
=-11+4,
=-7;

(3)3.14×6.49+3.14×(-5.49)-9×(-3.14)
=3.14×(6.49-5.49+9),
=3.14×10,
=31.4;

(4)(-1
1
2
2-(-
2
3
+
1
2
)÷(-
1
6
3
=
9
4
-(-
1
6
)×(-216),
=
9
4
-36,
=-
135
4
解题思路 56

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