如题所述
2015·2015÷2·0l5x201·5一20·l5简便运算2015.2015÷2.015x201.5 - 20.15 = 2015.2015x(201.5÷2.015) - 20.15 = 2015.2015x100 - 20.15 = 201520.15 - 20.15 = 201500