问题 解答题
怎样简便就怎样算.
375+450×25
9.07-22.78÷3.4
1.25×14×0.8
(
1
4
×3.2+0.8)×
5
9

5.65×
5
3
+
7
20
÷
3
5
答案

(1)375+450×25,

=375+11250,

=11625;

(2)9.07-22.78÷3.4,

=9.07-6.7,

=2.37;

(3)1.25×14×0.8,

=1.25×0.8×14,

=1×14,

=14;

(4)(

1
4
×3.2+0.8)×
5
9

=(0.8+0.8)×

5
9

=

8
5
×
5
9

=

8
9

(5)5.65×

5
3
+
7
20
÷
3
5

=5.65×

5
3
+
7
20
×
5
3

=(5

13
20
+
7
20
)×
5
3

=6×

5
3

=10.

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