700﹣16×5 589+659﹣289
8×4×12.5×2.5
8.9+3.01= 1- + = 1.2×5= 3.8÷0.038=
÷ = 3604÷62≈ 0.62-0.32= 1÷10%=
( - )×24= ×8÷ ×8=
1-0.74= = 0.01÷0.4= 8÷1.5÷2=
0.23= 7÷7%= = =