简便计算6.72-2.3÷0.5x0.8和6.25x0.56+0.625x3.4+5x6.25 15
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6.72-2.3÷0.5×0.8
=6.72-2.3÷1/2×0.8
=6.72-2.3×2×0.8
=6.72-4.6×0.8
=6.72-3.68
=3.04
6.25×0.56+0.625×3.4+5×6.25
=6.25×0.56+6.25×0.34+6.25×5
=6.25×（0.56+0.34+5）
=1.25×5×（8+5）
=1.25×5×8+1.25×25
=50+31.25
=81.25
=6.72-2.3÷1/2×0.8
=6.72-2.3×2×0.8
=6.72-4.6×0.8
=6.72-3.68
=3.04
6.25×0.56+0.625×3.4+5×6.25
=6.25×0.56+6.25×0.34+6.25×5
=6.25×（0.56+0.34+5）
=1.25×5×（8+5）
=1.25×5×8+1.25×25
=50+31.25
=81.25
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