问题 解答题
脱式计算.
(1)375+450÷18×25
(2)8.5×3-5.85÷1.3
(3)
1
2
-(
3
4
-
3
5
)÷
3
4

(4)(
7
9
+
1
3
)÷
8
15
×
3
10
答案

(1)375+450÷18×25,

=375+25×25,

=375+625,

=1000;

(2)8.5×3-5.85÷1.3,

=25.5-4.5,

=21;

(3)

1
2
-(
3
4
-
3
5
)÷
3
4

=

1
2
-
3
20
×
4
3

=

1
2
-
1
5

=

3
10

(4)(

7
9
+
1
3
)÷
8
15
×
3
10

=

10
9
×
15
8
×
3
10

=

5
8

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