8.9+3.01= 1- + = 1.2×5= 3.8÷0.038=
÷ = 3604÷62≈ 0.62-0.32= 1÷10%=
( - )×24= ×8÷ ×8=
0.48÷0.3= 36- = 2.5×40= ×(15+ )=
684+198= 12×1%= × = ×9÷ =