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计算(1)(-513)×(+178)×(-215);(2)36×(23−59+712);(3)用简便方法计算25×(12)2-(-25)×(15)+25×34;

题目详情
计算(1)(-5
1
3
)×(+1
7
8
)×(-2
1
5
);
(2)36×(
2
3
5
9
+
7
12
);
(3)用简便方法计算25×(
1
2
2-(-25)×(
1
5
)+25×
3
4
1
3
)×(+1
7
8
)×(-2
1
5
);
(2)36×(
2
3
5
9
+
7
12
);
(3)用简便方法计算25×(
1
2
2-(-25)×(
1
5
)+25×
3
4
1
3
1133
7
8
)×(-2
1
5
);
(2)36×(
2
3
5
9
+
7
12
);
(3)用简便方法计算25×(
1
2
2-(-25)×(
1
5
)+25×
3
4
7
8
7788
1
5
);
(2)36×(
2
3
5
9
+
7
12
);
(3)用简便方法计算25×(
1
2
2-(-25)×(
1
5
)+25×
3
4
1
5
1155
2
3
5
9
+
7
12
);
(3)用简便方法计算25×(
1
2
2-(-25)×(
1
5
)+25×
3
4
2
3
2233
5
9
5599
7
12
771212
1
2
2-(-25)×(
1
5
)+25×
3
4
1
2
11222
1
5
)+25×
3
4
1
5
1155
3
4
3
4
3344
▼优质解答
答案和解析
(1)(-5
1
3
)×(+1
7
8
)×(-2
1
5

=
16
3
×
15
8
×
11
5

=22;
(2)36×(
2
3
5
9
+
7
12

=36×
2
3
-36×
5
9
+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
1
3
111333)×(+1
7
8
)×(-2
1
5

=
16
3
×
15
8
×
11
5

=22;
(2)36×(
2
3
5
9
+
7
12

=36×
2
3
-36×
5
9
+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
7
8
777888)×(-2
1
5

=
16
3
×
15
8
×
11
5

=22;
(2)36×(
2
3
5
9
+
7
12

=36×
2
3
-36×
5
9
+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
1
5
111555)
=
16
3
×
15
8
×
11
5

=22;
(2)36×(
2
3
5
9
+
7
12

=36×
2
3
-36×
5
9
+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
16
3
161616333×
15
8
151515888×
11
5
111111555
=22;
(2)36×(
2
3
5
9
+
7
12

=36×
2
3
-36×
5
9
+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
2
3
222333−
5
9
555999+
7
12
777121212)
=36×
2
3
-36×
5
9
+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
2
3
222333-36×
5
9
+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
5
9
555999+36×
7
12

=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
7
12
777121212
=24-20+21
=25;
(3)原式=25×
1
4
+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
1
4
111444+25×
1
5
+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
1
5
111555+25×
3
4

=25×(
1
4
+
1
5
+
3
4

=30.
3
4
333444
=25×(
1
4
+
1
5
+
3
4

=30.
1
4
111444+
1
5
+
3
4

=30.
1
5
111555+
3
4

=30.
3
4
333444)
=30.