2.25乘以3/5+2.75除以5/3+60%

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2.25乘以3/5+2.75除以5/3+60%
2.25乘以3/5+2.75除以5/3+60%

2.25乘以3/5+2.75除以5/3+60%
2.25×3/5+2.75÷5/3+60%
=3/5×(2.25+2.75)+60%
=3/5×5+0.6
=3+0.6
=3.6