3.06×1.55 2.8小数简便运算?

2025-06-20 20:50:29
推荐回答(1个)
回答1:

3.06x1.55+2.8
=3x1.55+0.06x1.55+2.8
=4.65+0.093+2.8
=4.743+2.8
=7.543