2.25×15/4-2.75×9/4+3×225%简算
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2.25×15/4-2.75×9/4+3×225%简算2.25×15/4-2.75×9/4+3×225%简算2.25×15/4-2.75×9/4+3×225%简算2.25×15/4-2.75×9/4+
2.25×15/4-2.75×9/4+3×225%简算
2.25×15/4-2.75×9/4+3×225%简算
2.25×15/4-2.75×9/4+3×225%简算
2.25×15/4-2.75×9/4+3×225%
=2.25×(3.75-2.75+3)
=2.25×4
=9