4又7/25-7/15×3/5÷(7/45)怎么简算?
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4又7/25-7/15×3/5÷(7/45)
=4又7/25-7/15×3/5×45/7
=4又7/25-(7/15×45/7)×3/5
=4又7/25-3×3/5
=4又7/25-9/5
=4又7/25-1又4/5
=4又7/25-1又20/25
=2又12/25
=4又7/25-7/15×3/5×45/7
=4又7/25-(7/15×45/7)×3/5
=4又7/25-3×3/5
=4又7/25-9/5
=4又7/25-1又4/5
=4又7/25-1又20/25
=2又12/25
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