计算.8.8-79-(0.8+79)429×〔1-(34-38)〕34×7.8-0.75×2.8-75%111×28+999×879×8.9+79×10%234+159+2.25+349.-数学

题文

计算.
8.8-
7
9
-(0.8+
7
9
4
29
×〔1-(
3
4
-
3
8
)〕
3
4
×7.8-0.75×2.8-75%
111×28+999×8
7
9
×8.9+
7
9
×10%
2
3
4
+1
5
9
+2.25+3
4
9
题型:解答题  难度:中档

答案

8.8-
7
9
-(0.8+
7
9
),
=8.8-
7
9
-0.8-
7
9

=(8.8-0.8)-
7
9
×2,
=8-
14
9

=6
4
9

4
29
×〔1-(
3
4
-
3
8
)〕,
=
4
29
×〔1-
3
8
〕,
=
4
29
×
5
8

=
5
58
3
4
×7.8-0.75×2.8-75%,
=(7.8-2.8-1)×0.75,
=4×0.75,
=3;
111×28+999×8,
=111×28+111×72,
=111×(28+72),
=111×100,
=11100,;