题目内容

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
(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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