计算:(1)-2-5+19-13+1=______(2)12×(?56)×311÷114=______(3)17-8÷(-2)+4×(-3)=______(4

2024-11-24 11:25:45
推荐回答(1个)
回答1:

(1)-2-5+19-13+1,
=-7+19-12,
=0;

(2)

1
2
×(?
5
6
3
11
÷1
1
4

=-
1
2
×
5
6
×
3
11
×
4
5

=-
1
11


(3)17-8÷(-2)+4×(-3),
=17+4-12,
=9;

(4)(-
1
6
+
3
4
-
1
12
)×48,
=
1
2
×48,
=24;

(5)(?2)2?|?7|?2×(?
1
2
)

=4-7+1,
=-2;

(6)?
4
5
×[(?
1
2
)÷(0.75?1)+(?2)5]

=-
4
5
×(2-32),
=24.