能简算的用简便方法算．
9.28+1.82÷0.7 （71.2﹣71.2×0.9）÷0.25 6.5×2.3+6.5×6.7+6.5
7.8÷0.25÷4 1.37×99+1.37 4.8×6.2﹣12.4．
能简算的用简便方法算．
9.28+1.82÷0.7 （71.2﹣71.2×0.9）÷0.25 6.5×2.3+6.5×6.7+6.5
7.8÷0.25÷4 1.37×99+1.37 4.8×6.2﹣12.4．
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