问题 解答题
计算
2037-2037÷21.4375+884÷26×25.
8.5+(5.6-4.8)×13.[9.2+0.8×(9-7.75)]÷0.4.
(
5
12
+
5
18
)
÷
5
8
2.25×1.8+1.25×0.18.
[17.1-17.1÷(3.1-2
1
10
)]×599
答案

(1)2037-2037÷21

=2037-97

=1940;

(2)4375+884÷26×25

=4375+34×25

=4375+850

=5225;

(3)8.5+(5.6-4.8)×13

=8.5+0.8×13

=8.5+10.4

=18.9;

(4)[9.2+0.8×(9-7.75)]÷0.4

=[9.2+0.8×1.25]÷0.4

=[9.2+1]÷0.4

=10.2÷0.4

=25.5;

(5)(

5
12
+
5
18
)÷
5
8

=

5
12
×
8
5
+
5
18
×
8
5

=

2
3
+
4
9

=

10
9

(6)2.25×1.8+1.25×0.18

=2.25×1.8+0.125×1.8

=1.8×(2.25+0.125)

=1.8×2.375

=4.275;

(7)[17.1-17.1÷(3.1-2

1
10
)]×599

=[17.1-17.1÷1]×599

=0×599

=0.

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