1÷= = 1.1+0.11= 2.4×50%= 0.24÷0.8=
= 8×= 10﹣0.99= 0.22= 4×25%÷4×25%=
x-x=10.8 +x=20×0.5 x:=2:1.75
20﹣12÷
①78×101
②36.2﹣5.7﹣4.3
③36×(++)
④3.5÷×0.3
⑤÷[(﹣)×]
⑥12.5×2.5×32
①( ﹣ )×24
②0.36×99+0.36
③20.8﹣(9.6+0.125÷12.5%)
④( ﹣ ÷2)×
⑤2.5×16×12.5
⑥0.5÷[ ﹣( ﹣ )]