2.15乘0.9加21.5乘0.11简便计算

2025-12-25 08:52:00
推荐回答(1个)
回答1:

2.15x0.9+21.5x0.11
=2.15x0.9+2.15x(10x0.11)
=2.15x0.9+2.15x1.1
=2.15x(0.9+1.1)
=2.15x2
=4.3