能简算要简算:(1/2+3/5)×5/11=?8÷(6+2.5×4/5)

问题描述:

能简算要简算:(1/2+3/5)×5/11=?8÷(6+2.5×4/5)

(1/2+3/5)×5/11=11/10x5/11=1/2
8÷(6+2.5×4/5)
=8÷(6+2)
=8÷8
=1

(1/2+3/5)×5/11
=(5/10+6/10)x5/11
=11/10x5/11
=1/2
8÷(6+2.5×4/5)
=8÷(6+5/2×4/5)
=8÷8
=1
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