>>>
4× = ÷60%= ÷3= 4.2× = ÷ =
12÷ = + = × + = × × = ( - )×20=
① × ÷
②24÷(1- )
③ + ÷ +
④ ×2.5×13×4
⑤( + )×24
⑥ ×94+