=。
127+38= 8.8÷0.2= 2-1 = ×1 =
1÷7+ = 1-1× = + = 1.02-0.43=
÷25%× = ×2÷ ×2=
0.9+99×0.9=
2.5× ×0.4=
( )×6=
1-1 =
1.02-0.43-0.57=
20-19.02=
2÷ - ÷2=