7.8÷2.6+2.7×1.5能简便计算
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7.8÷2.6+2.7×1.5
=39÷13+2.7×3/2
=3+1.35×3
=3+1.3×3+0.05×3
=3+3.9+0.15
=6.9+0.15
=7.05
=39÷13+2.7×3/2
=3+1.35×3
=3+1.3×3+0.05×3
=3+3.9+0.15
=6.9+0.15
=7.05
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