请展开查看知识点列表
①3.4+5.3=
3.8+4.9=
②4.8-2.5=
5.2-3.6=
③4.38+2.4=
3.15+2.65=
④3.6+7.3+6.4=
12.5-4.2-5.8=
问题一: ▲
问题二: ▲
问题三: ▲
-x=3.7
x=
①4.2+3.3=
9.3+2.5=
2.3+13.67=
②2.34+3.63=
0.24+0.31=
0.46+0.54=
③0.78+2.2=
6.4+1.07=
0.55+5.5=
①3.5+2.1=
3.5-2.1=
②0.9+0.1=
0.9-0.1=
③0.51+0.42=
0.51-0.42=
进入组卷