×75%+× 50%+0.5+ 5×7×()
50%×2.5××64 32 × (+)
(1-75%)÷(1+) ÷[( -0.75)×60%]
(1-25%)÷(1+) 2.4÷(1-30%-40%)
36×60%+×14 (+-)×36
87× 0.25×32×12.5
2.7÷(1-20%-50%) (1-75%)÷(1+25%)
0.41×-16%÷62.5% (6.7×60%+3.3×60%)÷
2.5×12.5×1.6×20%
0.25×1.25÷ 8.5×80%+1.5÷
( + )×17×21 2022 ×