13.6+6.44= 1- = 0.48×2.5= 3.15÷3= + =
2.54-0.4= 5.3+7= 9÷14= 0.32= 1.25×0.8÷1.25×0.8=
①3.85+1.5x=6.1
②3x-=1.25
+=
1-=
-=
0.5-=