计算:(1)?14+56+23?12(2)?23÷49×(?23)2(3)(?12557)÷(?5)(4)(-2)2+(-3)×[(-4)2+2]-(-

2024-11-08 04:45:38
推荐回答(1个)
回答1:

(1)?

1
4
+
5
6
+
2
3
?
1
2

=-
3
12
+
10
12
+
8
12
-
6
12

=
1
2


(2)?23÷
4
9
×(?
2
3
)2

=-8×
9
4
×
4
9

=-8;

(3)(?125
5
7
)÷(?5)

=25
1
7


(4)(-2)2+(-3)×[(-4)2+2]-(-3)2÷(-2)
=4+(-3)×18-9÷(-2)
=4-5.5.