1又1/47又1/138+81又1/131.25%1又1/138+4又12/13÷4/5

来源：学生作业学帮网编辑：学帮网时间：2024/06/01 06:03:40

1又1/4*7又1/13*8+8*1又1/13*1.25%*1又1/13*8+4又12/13÷4/5

原式=5/4×8×92/13+14/13×14/13×0.64×1.25+64/13×5/4
=5/4×(736/13+64/13)+196/169×4/5
=5/4×800/13+784/845
=1000/13+784/845
=65000/845+784/845
=65784/875