2.61乘39.5加0.7乘261加9.05乘26.1的简便运算_数学解答

2.61乘39.5加0.7乘261加9.05乘26.1的简便运算

人气：478 ℃　时间：2020-04-13 05:53:00

解答

2.61*39.5+0.7*261+9.05*26.1
=26.1*3.95+26.1*7+26.1*9.05
=26.1*(3.95+7+9.05)
=26.1*20
=522