4:3/5,2:2/5,7:3/7,4:7/4,0.25:1/2,0.75:3/4,0.125:1/8,2:1/7,5/

4:3/5,2:2/5,7:3/7,4:7/4,0.25:1/2,0.75:3/4,0.125:1/8,2:1/7,5/ 0.75+(-2又3/4)+(+0.125)+（-12又5/7）+(-4又1/8) 0.75+(-2 3/4)+(0.125)+(-12 5/7)+(-4 (+3/4)+(-2 3/4)+(+0.125)+(-12 5/7)+(-4 1/8) 0.75+(-2又4分之3)+0.125+12又7分之5+(-4又8分之1)等于多少 简便计算 0.75+(2又3/4)+(+0.125)+（-12又5/7）+(-4又1/8) 0.75+(-2又5/7)-（-0.125)+(-12又 5/7)-4又1/8 1+2+3+4+5+6+4+3+2+4+56+7+7+8+89+9+0+7+7+7+7+7+7+7++5+53+3+33 7+7+7+7+7+7+1+2+3+4+5+6+7+0+8+91+2+3+4+5+6+7+8+9+0+123+456+7 1+2+3+4+5+6+7+8+9+8+7+4+56+1+2+3 4/3*5/7+7/3除以7/5 40*(3/5+7/8) 1/5除以(7/5+2/7*21/5) 5/6*2/3除以（ 1+2+3+4+5+6+7