(七又八分之一减去二点七五)除以(三又二分之一加五点二五)简便运算

Answer 1

(7 1/8 - 2.75) / (3 1/2 + 5.25)
= (7 1/8 - 2 6/8) / (3 2/4 + 5 1/4)
= (35/8) / (35/4)
= 1/2