计算:(1)34+53?74+73;(2)(14+53)×(?12);(3)8+|-3|+5×(-2);(4)?12×6+(?2)3

2024-10-30 10:44:26
推荐回答(1个)
回答(1):

(1)

3
4
+
5
3
?
7
4
+
7
3

=(
3
4
?
7
4
)+(
5
3
+
7
3

=-1+4
=3;
(2)(
1
4
+
5
3
)×(-12)
=-3-20
=-23;
(3)8+|-3|+5×(-2)
=8+3-10
=1;
(4)-
1
2
×6+(-2)3
=-3-8
=-11.