10.64/2.8+17.36/28=?

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10.64/2.8+17.36/28=?10.64/2.8+17.36/28=?10.64/2.8+17.36/28=?106.4/28+17.36/28=(106.4+17.36)/28=123.7

10.64/2.8+17.36/28=?
10.64/2.8+17.36/28=?

10.64/2.8+17.36/28=?
106.4/28+17.36/28=(106.4+17.36)/28=123.76/28=4.42

10.64/2.8+17.36/28=(10.64+17.36)/28=28/28=1

10.64/2.8+17.36/28=106.4/28+17.36/28=123.76/28=4.42

简单
10.64/2.8+17.36/28
=106.4/28+17.36/28
=(106.4+17.36)/28
= 123.76/28
= 4.42

楼主是不是写错题了?

奥数???