8×500= 300÷10= 2×35= 200×5=
140÷20= 68÷4= 15×8= 51÷3=
0.54÷0.12
1.08÷4.5
87÷33
①( ﹣ )×24
②0.36×99+0.36
③20.8﹣(9.6+0.125÷12.5%)
④( ﹣ ÷2)×
⑤2.5×16×12.5
⑥0.5÷[ ﹣( ﹣ )]