计算:999×999+1999=______.
计算:888×999=______.
计算:99999+9999+999+99+9=______.
计算:1.999×370-19.99×6+1999×0.69=______.
计算20002-4000×1999+19992=______.
计算:1000+999-998+997+996-995+…+103+102-101=______.
计算:5002-499×501=______.
计算:1232-122×124=______.
计算:1001×1001-1001=______.
简便计算:101×99=______.
计算:lg2+lg5=______.
计算:1.996+19.97+199.8=______.
计算5.762-4.242=______.