2.87x5.6-0.87+4.4简便怎么算?

2.78x5.6-0.87+4.4怎么算?
2025-02-28 09:20:00
推荐回答(1个)
回答1:

利用结合律,原式=2.87×5.6-(2+0.87)+2+4.4=2.87×(5.6-1)+6.4=2.87×4.6+4.6+1.8=4.6×3.87+1.8=19.602