2710×59+313÷89.123-179×0.05÷13134×(137+137+137+137)[2034-(29+14)×36]÷78(1-14)÷(2.1-25×1.5)23×[2.83-(0.83+57)]÷47.-数学

14)×36]÷
7
8

=[20
3
4
-(
2
9
×36+
1
4
×36)]÷
7
8

=[20
3
4
-(8+9)]÷
7
8

=[20
3
4
-17]÷
7
8

=3
3
4
÷
7
8

=
30
7


(5)(1-
1
4
)÷(2.1-
2
5
×1.5),
=
3
4
÷(2.1-0.6),
=
3
4
÷1.5,
=0.5;

(6)
2
3
×[2.83-(0.83+
5
7
)]÷
4
7

=
2
3
×[2.83-1.58]÷
4
7

=
2
3
×1.25÷
4
7

=
5
6
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