对，都是875克。
x-7/8=12.5% x-7/8=1/8 x=7/8+1/8 x=1 ， 你好，本题已解答,如果满意 请点右下角“采纳答案”。
28.8-（7.6+1/8÷12.5%） =28.8-（7.6+1） =28.8-8.6 =20.2
=3/7×1/8-2/7×1/8 =(3/7-2/7)X1/8 =1/7X1/8 =1/56
如图
=16.5×7.2×（12.5%-12.5%）×15/19 =0
c项错误，甲数是7的话，7*0.125=0.875 乙数是8比7多1.不是0.875
7.1*1/8+1.9*12.5%-0.125 =7.1*0.125+1.9*0.125-0.125 =(7.1+1.9-1)*0.125 =8*0.125 =1
2/7×1/8+12.5%×2/7+0.125×1/7 =2/7×1/8+1/8×2/7+1/8×1/7 =（2/7+2/7+1/7）×1/8 =5/7×1/8 =5/56
7/5除以12.5%加7/2乘8/1简便计算 =7/5➗0.125+7/2x8 =7/5➗（1/8）+7x4 =56/5+28 =11+1/5+28 =39又5分之1