①×
②÷10
③×42×
④÷÷
⑤÷8×
⑥×÷
100×25%=
÷40%=
1-72%=
36%+64%=
80×(1+25%)=
60÷(1-40%)=
45×(1-20%)=
72÷(1+20%)=
①=( )÷( )=( )×( )=( )
②6:18
③2.4:1.8
④3.5:
⑤0.45t:200kg
⑥4:
□〇□=□( )
8.9+3.01= 1- + = 1.2×5= 3.8÷0.038=
÷ = 3604÷62≈ 0.62-0.32= 1÷10%=
( - )×24= ×8÷ ×8=