+1 = ×6%= 1 + = ×56×0× =
× ÷ × = 25%+7.5%= ×125%= 4-4%=
24÷0.3%= -17%=
①2 × +0.25× -25%
②(1-75%)÷(1+ )
③ × ×
④ × + ÷
⑤ ×[1-( - )]
⑥ +3 - +