68.75乘16加3.28乘687.5加197乘6.875加0.315乘6875=?简便运算
问题描述:
68.75乘16加3.28乘687.5加197乘6.875加0.315乘6875=?简便运算
答
68.75×16+3.28×687.5+197×6.875+0.315×6875
=68.75×16+32.8×68.75+19.7×68.75+31.5×68.75
=68.75×(16+32.8+19.7+31.5)
=68.75×100
=6875
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