8÷ = 2.4÷ = ÷ =
× ÷ = 1- × = 2÷ =
×45= ×2= × =
÷ = ÷6= ÷ =
①
②
③
④
⑤
⑥
⑦
⑧
① × ÷
② × ×
③ ×33+ ×67
④ ÷ ÷
⑤ ×
⑥ ÷