如题所述
第1个回答 2021-07-17
解:原式=3/8+3/8+1/4+(7/12+5/12)
=3/4+1/4+1
=1+1
=2
=3/4+1/4+1
=1+1
=2
第2个回答 2021-07-17
3/8+7/12+3/8+5/12+1/4
=(3/8+3/8)+(7/12+5/12)+1/4
=6/8 +1 +1/4
=3/4+1/4 +1
=1+1
=2
=(3/8+3/8)+(7/12+5/12)+1/4
=6/8 +1 +1/4
=3/4+1/4 +1
=1+1
=2
