2.9x0.45 0.29x4.2 0.029x13用简便方法计算

2.9x0.45 0.29x4.2 0.029x13用简便方法计算
2025-04-29 23:03:48
推荐回答(2个)
回答1:


接下

回答2:

2.9x0.45+0.29x4.2+0.029x13
=2.9x0.45+2.9x0.42+2.9x0.13
=2.9x(0.45+0.42+0.13)
=2.9x1
=2.9