5/7+1/4-9/14
7分之5-(4分之1-14分之9)
5/7,加1/4减9/14等于多少,
[7/1/14][24/9/5] [4/21] [26/8/5] [23/15] [1/9] [14/9] [13/5/
4/7+1/4-9/14=?
(3/5+7/8)*40 11/3-5/7*14/15 5/6/(4/7/9/14) (5/8-1/10)*(5/9+1
1.0.7×19 4/9+2 3/4×-14+0.7×5/9+1/4×-14 2.-36×-4/9+5/6-7/12 3
4/5+[7/8-4/5] 7/10-[2/15+1/6] 1-1/3-1/7 5/6+11/14 5/6-[4/9-1
7/9*5/6/14/27 1/2*2/5+9/10/9/20 5/8*1/4/5/8*1/4 (1/2+2/3+3/4
1/9{7【1/5(x+4)+1】-5}=1 (4x-7)/5-(5x-4)/2=(14-x)/4
23 15) (24 9 1 14 7) (14 9) (25 21 ) (6 5 14 7)
1+2+3+4+5+6+7+8+9+1+11+12+13+14+15````````
1/12*8/9*8/4、(1/14+2/7)*7/8、19*(1/2-7/19)、4/5-1/3*3/4、26+1/5