÷ = × = 21× = ÷ =
× = ÷5= + = 36÷ =
① × ×
② ÷ ×
③( - )×24
④ ×99+
⑤( + × )÷
⑥ ÷[ ×( + )]
请你算一算:六(1)班应到哪家商场购买合算?