【1】(7/9+5/6)除以1/18 【2】1/5*4除以2/5
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【1】(7/9+5/6)除以1/18 【2】1/5*4除以2/5
【1】(7/9+5/6)除以1/18 【2】1/5*4除以2/5
【1】(7/9+5/6)除以1/18 【2】1/5*4除以2/5
【1】(7/9+5/6)除以1/18
=7/9×18+5/6×18
=14+15
=29
【2】1/5*4除以2/5
=1/5×4×5/2
=2
回答完毕
【1】(7/9+5/6)除以1/18
=(7/9+5/6)x18
=14+15
=29
【2】1/5*4除以2/5
=(4/5)x(5/2)
=2