计算:(1)-72+72÷36(2)323×(13-12)×311÷54(3)(-1)3-(1-12)÷3×[2-(-3)2](4)-92+2×(-3)2-(-...

2023-07-05 22:38发布

这道初中数学的题目是:
计算:
(1)-72+72÷36                           
(2)3
2
3
×(
1
3
-
1
2
3
11
÷
5
4

(3)(-1)3-(1-
1
2
)÷3×[2-(-3)2]
(4)-92+2×(-3)2-(-6)÷(-
4
3
)

(5)-2×(-
1
2
)2+|-(-2)|3-(-
1
2
)

(6)(
1
50
-1)×(
1
49
-1)×(
1
48
-1)×…×(
1
4
-1)×(
1
3
-1)×(
1
2
-1)
1条回答
101℃太阳
2023-07-05 22:58
这道初中数学题的正确答案为:
(1)-72+72÷36 
=-72+2
=-70;
                          
(2)3
2
3
×(
1
3
-
1
2
3
11
÷
5
4

=
11
3
×(-
1
6
)×
3
11
×
4
5

=
2
15


(3)(-1)3-(1-
1
2
)÷3×[2-(-3)2]
=-1-
1
2
×
1
3
×[2-9]
=-1-
1
6
×[-7]
=-1+
7
6

=
1
6


(4)-92+2×(-3)2-(-6)÷(-
4
3
)

=-81+2×9-4.5
=-81+18-4.5
=-67.5;

(5)-2×(-
1
2
)2+|-(-2)|3-(-
1
2
)

=-2×
1
4
+8+
1
2

=-
1
2
+8+
1
2

=8;

(6)(
1
50
-1)×(
1
49
-1)×(
1
48
-1)×…×(
1
4
-1)×(
1
3
-1)×(
1
2
-1)

=-
49
50
×
48
49
×…×
2
3
×
1
2

=-
1
50
解题思路 23

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