6年级上册计算题大全800题及答案 [3/4-7/8/(5/6+4/5)]*28 =[3/4-7/8÷49/30]*28 =[3/4-15/28]*28 =3/4*28-15/28*28 =21-15 =6 (1.25*4/5-0.76)/(1又3/8+1又1/40） =(1-0.76)/2.4 =0.24/2.4 =0.1 [(0.2+1/3)*4.5]/(8又1/20-6.45） =8/15*4.5/1.6 =2.4/1.6 =1.5 x+3又2/3=5 x*9又3/4=7又1/11 x/2/5=10 6又2/3-x=4.25 6.4*1.7+6又2/5*8.3 （4又6/7+1.75）/1又11/14+3又5/6 2.16-7x=0.06 1/2x-0.5=5又1/2 8.16-1.26/0.3*1.5 =8.16-4.2*1.5 =8.16-6.3 =1.86 8.4*[(1.2+3又1/3）/3.4-1/2] =8.4*[68/16/3.4-1/2] =8.4*[5/4-1/2] =8.4*3/4 =6.3 5.8：x=3又1/2:7 3.5x=7*5.8 x=7/3.5*5.8 x=2*5.8 x=11.6 3/10*55-4x=14.5 16.5-4x=14.5 4x=2 x=0.2 19.38-4又7/8-5又1/8 =1.938-(4又7/8+5又1/8） =19.38-10 =9.38 13又7/13-（6又3/5+3又7/13） =13又7/13-3又7/13-6又3/5 =10-6又3/5 =3.4 1又3/4+[2又3/14-（2又3/14-1.875）]/2又1/12 =1又3/4-15/8*12/25 =1又3/4-9/10 =0.85 （9.4-8又2/5）/[（1.1+1/15）*1又7/18] =1/[7/6*25/18] =1÷175/108 =108/175 本文来源：https://www.wddqw.com/doc/6395bb5028160b4e767f5acfa1c7aa00b52a9db9.html