计算:(1)4×(-5)-(-42)÷2;(2)?22÷(?1625)×(?45)2;(3)(56?512+23)×(?6)÷132;(4)32×

2025-05-08 23:51:51
推荐回答(1个)
回答1:

(1)原式=4×(-5)-(-21)
=-20+21
=1;

(2)原式=-22×(-

25
16
)×
16
25

=4×
25
16
×
16
25

=4;

(3)(
5
6
?
5
12
+
2
3
)×(?6)÷
13
2

=(
10
12
-
5
12
+
8
12
)×(-6)×
2
13

=
13
12
×(-6)×
2
13

=-6;

(4)32×[(?
1
3
)
3
÷(
5
3
)
2
]×|?
25
3
|?(?5)

=9×[-
1
27
×
9
25
25
3
+5
=-1+5
=4.