0.7×24.5+0.7×6.5-0.7 16.6×0.54+1.66×3.6+1.66 简便计算.写出过程.急~~~~~~

题目

0.7×24.5+0.7×6.5-0.7 16.6×0.54+1.66×3.6+1.66 简便计算.写出过程.急~~~~~~
0.7×24.5+0.7×6.5-0.7简便计算 16.6×0.54+1.66×3.6+1.66 简便计算

答案

0.7×24.5+0.7×6.5-0.7简便计算
=0.7×(24.5+6.5-1)
=0.7×30
=21;
16.6×0.54+1.66×3.6+1.66 简便计算
=1.66×(5.4+3.6+1)
=1.66×10
=16.6
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