13乘以（26分之5+22分之5）乘以11分之4_数学解答

13乘以（26分之5+22分之5）乘以11分之4

人气：463 ℃　时间：2020-02-03 21:24:12

解答

13*(5/26+5/22)*(4/11)
=65*(1/26+1/22)*(4/11)
=65*(11/286+13/286)*(4/11)
=65*(24/286)*(4/11)
=65*(12/143)*(4/11)
=65*(48/1573)
=3120/1573
=1又(1547/1573)