256×7-567,用简便方法怎么做?

2025-04-02 20:30:32
推荐回答(1个)
回答1:

256×7-567,用简便方法计算:
256×7-567=256x7-81x7
=(256-81)x7
=175*7
=100x7+70x7+5x7
=700+490+35
=1190+35
=1225