0.5+2.3= 120÷30= 7.2+0.8= 4.3-1.2=
2-0.7= 2.4-1.6= 24×5= 0.3+0.47=
240÷6= 1.3-0.6= 2.3+5.7= 360-360÷6=
①3.75×1.43.75 ②0.52×8.328.32
③4.26×14.26 ④2.84×1.031.72×2.84