0.05+6.5= 0÷185= 2×12×5= ( )×100=4
6.9-3= 330÷2÷5= 50-50÷5= ( )÷10=6.18
96+104= 9.8÷100= 0.36×1000= 720÷9×4=
5.2-1.2= 5.6+0.7= 2.5×4= 3.6×1.5=
0.49×30= 1000×2.63= 1.03÷100=