7.28x0.1十0.5x72.8十0.049x728的简便运筸怎么做?

2025-04-28 04:12:11
推荐回答(1个)
回答1:

=7.28x0.1+7.28x5+7.28x4.9
=7.28x(0.1+5+4.9)
=7.28x10
=72.8