问题 解答题
列式计算.
12×(87+368÷16)
3-
3
2
×
10
21
-
2
7
6×18+4.4×18
8
9
×[
3
4
-(
15
16
-
3
4
答案

(1)12×(87+368÷16)

=12×(87+23)

=12×110

=1320;

(2)3-

3
2
×
10
21
-
2
7

=3-

5
7
-
2
7

=3-(

5
7
+
2
7

=3-1

=2;

(3)6×18+4.4×18

=(6+4.4)×18

=10.4×18

=187.2;

(4)

8
9
×[
3
4
-(
15
16
-
3
4

=

8
9
×[
3
4
-
3
16
]

=

8
9
×
9
16

=

1
2

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