Question

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~~~~

Answer 1

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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