4.1-3.8= 4+0.78= 14.6-0.4= 1.3+8.6= 0.8-0.55=
4-0.04= 1-0.03= 3.5+3.5= 0.8-0.5= 0.78+2.2=
0.56÷0.8= = = =
5×( )= 30×= 0.53= 3﹣=