(12又4/9 +7又5/13 )÷(24又8/9 +14 又10/13)
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 14:42:49
![(12又4/9 +7又5/13 )÷(24又8/9 +14 又10/13)](/uploads/image/z/16849-1-9.jpg?t=%2812%E5%8F%884%2F9+%2B7%E5%8F%885%2F13+%29%C3%B7%2824%E5%8F%888%2F9+%2B14+%E5%8F%8810%2F13%29)
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(12又4/9 +7又5/13 )÷(24又8/9 +14 又10/13)
(12又4/9 +7又5/13 )÷(24又8/9 +14 又10/13)
(12又4/9 +7又5/13 )÷(24又8/9 +14 又10/13)
(12又4/9 +7又5/13 )÷(24又8/9 +14 又10/13)
=(12+4/9 +7+5/13 )÷(24+8/9 +14 +10/13)
发现前一括号内的所有项一一对应后括号内的所有项.都是差两倍
所以=2(12+4/9 +7+5/13 )÷(24+8/9 +14 +10/13)÷2
= (24+8/9 +14 +10/13)÷(24+8/9 +14 +10/13)÷2
=1/2)