题目内容

6.3×8.7+8.7×3.7
1
3
-
1
6
+
1
4
)×12
7
4
×
5
8
+
1
4
÷
8
5
0.625×(8.3-2.5×0.12)
3
7
-
3
7
÷3
9
20
÷[
1
2
×(
2
3
+
4
5
)].
(1)6.3×8.7+8.7×3.7,
=(6.3+3.7)×8.7,
=10×8.7,
=87;

(2)(
1
3
-
1
6
+
1
4
)×12,
=
1
3
×12-
1
6
×12+
1
4
×12,
=4-2+3,
=5;

(3)
7
4
×
5
8
+
1
4
÷
8
5

=
7
4
×
5
8
+
1
4
×
5
8

=(
7
4
+
1
4
)×
5
8

=2×
5
8

=
5
4


(4)0.625×(8.3-2.5×0.12),
=0.625×(8.3-0.3),
=0.625×8,
=5;

(5)3÷
3
7
-
3
7
÷3,
=7-
1
7

=6
6
7


(6)
9
20
÷[
1
2
×(
2
3
+
4
5
)],
=
9
20
÷[
1
2
×
22
15
],
=
9
20
÷
11
15

=
27
44
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