题目内容

在横线里填上“>”、“<”或“=”
6
5
×
2
3
+
1
4
______
7
12
×
12
7
1
5
×(1+
1
2
)
______
6
5
×
1
12
×3
100×
7
99
______99×
7
90
7
9
×(
2
3
-
2
7
)
______
5
9
×
9
10
×
1
2
(1)因为
5
6
×
2
3
+
1
4

=
4
5
+
1
4

=
21
20

7
12
×
12
7
=1,
所以
5
6
×
2
3
+
1
4
7
12
×
12
7


(2)因为
1
5
×(1+
1
2

=
1
5
×
3
2

=
3
10

6
5
×
1
12
×3
=
1
10
×3
=
3
10

所以
1
5
×(1+
1
2
)=
6
5
×
1
12
×3;

(3)因为100×
7
99

=(99+1)×
7
99

=7+
7
99

=7
7
99

99×
7
90

=(90+9)×
7
90

=7+
7
10

=7
7
10

所以100×
7
99
<99×
7
90


(4)因为
7
9
×(
2
3
-
2
7

=
7
9
×
8
21

=
8
27

5
9
×
9
10
×
1
2

=
1
2
×
1
2

=
1
4

所以
7
9
×(
2
3
-
2
7
)>
5
9
×
9
10
×
1
2

故答案为:>;=;<;>.
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