①4.56+5.44×0.2 按顺序 ②0.75×12.5 用简便计算
问题描述：
①4.56+5.44×0.2 按顺序 ②0.75×12.5 用简便计算
答
4.56+5.44×0.2 =4.56+1.088=5.648
0.75×12.5 =3/4×（12+1/2）=9+3/8=9又3/8
答
0 `8*125-o5*125=10- o625=9375
答
①4.56+5.44×2
=4.56+5.44+5.44
=10+5.44
=15.44
②0.75×12.5
=(0.8-0.05)×12.5
=10-0.625
=9.375
若有疑问可以百度Hi、