计算:12-22+32-42+52-62+…-1002+1012=______.
计算:12-22+32-42+52-62+…-1002+1012=______.
计算:12-22+32-42+…+992-1002=______.
计算:12-22+32-42+52-62+72-82+92-102=______.
计算:28.67×67+32×28.67+573.4×0.05=______.
计算:121×0.13+12.1×0.9-12×1.21=______.
计算:33°52′+21°54′=______度______分.
计算:2-22-23-…-218-219+220=______.
计算22012-22011-22010-…-22-21-1=______.
计算:5002-499×501=______.
计算:1232-122×124=______.
计算:1001×1001-1001=______.
简便计算:101×99=______.