0.79×0.46+7.9×0.24+11.4×0.079=?简便计算!

问题描述:

0.79×0.46+7.9×0.24+11.4×0.079=?简便计算!

=0.79×(0.46+2.4+1.14)
=0.79×4
=3.16
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