问题 解答题
计算下面各题
7
15
×
3
14
=
9
4
×
11
5
=
29
33
×
44
87
=
2
9
×
5
12
=
1
6
+
5
7
×
14
25
×
5
12
×
14
15
=
答案

(1)

7
15
×
3
14

=

=

1
10

(2)

9
4
×
11
5

=

9×11
4×5

=

99
20

(3)

29
33
×
44
87

=

4
9

(4)9×

2
9
×
5
12

=2×

5
12

=

5
6

(5)

1
6
+
5
7
×
14
25
×
5
12
×
14
15

=

1
6
+
2
5
×
5
12
×
14
15

=

1
6
+
1
6
×
14
15

=

1
6
+
7
45

=

29
90

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