（39+39/61）÷39
=39÷39+39/61÷39
=1+1/61
=1又1/6111.36×7分之6+8.64÷6分之7 简算原式：11.36×6/7+8.64÷7/6=11.36×6/7+8.64×6/7=（11.36+8.64）×6/7=20×6/7=120/7 （望采纳，谢谢）