首页 > 在横线里填上“＞”、“＜”或“=”65×23+14______712×12715×(1+12)______65×112×3100×799______99×79079×(23-27)______59×9

在横线里填上“＞”、“＜”或“=”65×23+14______712×12715×(1+12)______65×112×3100×799______99×79079×(23-27)______59×9

题目简介

在横线里填上“＞”、“＜”或“=”65×23+14______712×12715×(1+12)______65×112×3100×799______99×79079×(23-27)______59×9

题目详情

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
．
题型：填空题难度：偏易来源：不详

答案

（1）因为class="stub"5
6
×class="stub"2
3
+class="stub"1
4

=class="stub"4
5
+class="stub"1
4

=class="stub"21
20
，
class="stub"7
12
×class="stub"12
7
=1，
所以class="stub"5
6
×class="stub"2
3
+class="stub"1
4
＞class="stub"7
12
×class="stub"12
7
；

（2）因为class="stub"1
5
×（1+class="stub"1
2
）
=class="stub"1
5
×class="stub"3
2

=class="stub"3
10
，
class="stub"6
5
×class="stub"1
12
×3
=class="stub"1
10
×3
=class="stub"3
10
，
所以class="stub"1
5
×（1+class="stub"1
2
）=class="stub"6
5
×class="stub"1
12
×3；

（3）因为100×class="stub"7
99

=（99+1）×class="stub"7
99

=7+class="stub"7
99

=7class="stub"7
99
，
99×class="stub"7
90

=（90+9）×class="stub"7
90

=7+class="stub"7
10

=7class="stub"7
10
，
所以100×class="stub"7
99
＜99×class="stub"7
90


（4）因为class="stub"7
9
×（class="stub"2
3
-class="stub"2
7
）
=class="stub"7
9
×class="stub"8
21

=class="stub"8
27
，
class="stub"5
9
×class="stub"9
10
×class="stub"1
2

=class="stub"1
2
×class="stub"1
2

=class="stub"1
4
，
所以class="stub"7
9
×（class="stub"2
3
-class="stub"2
7
）＞class="stub"5
9
×class="stub"9
10
×class="stub"1
2
．
故答案为：＞；=；＜；＞．

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