脱式计算(能简便计算的要简便计算).15×43%+85×0.4379÷115+29×511(12-13)×38÷25%

2024-11-02 06:34:20
推荐回答(1个)
回答(1):

(1)15×43%+85×0.43
=15×0.43+85×0.43,
=(15+85)×0.43,
=100×0.43,
=43;

(2)

7
9
÷
11
5
+
2
9
×
5
11

=
7
9
×
5
11
+
2
9
×
5
11

=(
7
9
+
2
9
)×
5
11

=1×
5
11

=
5
11


(3)(
1
2
-
1
3
)×
3
8
÷25%
=(
3
6
?
2
6
)×
3
8
÷
1
4

=
1
6
×
3
8
×4,
=
1
4