58/59×60怎样简便

问题描述:

58/59×60怎样简便

他们的答案对的

58/59×60
=58/59×(59+1)
=(58/59)×59+58/59
=58又58/59

58/59×60
=58/59×(59+1)
=58/59×59+58/59
=58+58/59
=58又58/59