问题 解答题
计算:
1375+450÷18×25
8
9
×[
3
4
-(
7
16
-
1
4
)].
答案

(1)1375+450÷18×25

=1375+25×25,

=1375+625,

=2000;

(2)

8
9
×[
3
4
-(
7
16
-
1
4
)]

=

8
9
×[
3
4
-
7
16
+
1
4
],

=

8
9
×[
3
4
+
1
4
-
7
16
],

=

8
9
×[1-
7
16
],

=

8
9
×
9
16

=

1
2

选择题
选择题