计算:7.81×49-78.1×3.8+0.781×90=______.
计算:7.81×49-78.1×3.8+0.781×90=______.
计算:3.51×49+35.1×5.1+49×51=______.
计算:5002-499×501=______.
计算:1232-122×124=______.
计算:1001×1001-1001=______.
简便计算:101×99=______.
计算:888×999=______.
计算:lg2+lg5=______.
计算:1.996+19.97+199.8=______.
计算5.762-4.242=______.
计算:57.32°=______度______分______秒.
计算5+10+15+20+…+90+95+100=______.