2.61乘39.5加0.7乘261加9.05乘26.1的简便运算

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2.61乘39.5加0.7乘261加9.05乘26.1的简便运算2.61乘39.5加0.7乘261加9.05乘26.1的简便运算2.61乘39.5加0.7乘261加9.05乘26.1的简便运算2.61

2.61乘39.5加0.7乘261加9.05乘26.1的简便运算
2.61乘39.5加0.7乘261加9.05乘26.1的简便运算

2.61乘39.5加0.7乘261加9.05乘26.1的简便运算
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