What is 1.225 + 2.225 + 3.225 +. + 50.225? I'm waiting to use it. I'd better tell the rules. I'll do it later Another question: (2008-1) + (2007-2) + (2006-3) +... (1005-1004) also tell me the rules and answers

What is 1.225 + 2.225 + 3.225 +. + 50.225? I'm waiting to use it. I'd better tell the rules. I'll do it later Another question: (2008-1) + (2007-2) + (2006-3) +... (1005-1004) also tell me the rules and answers

The original formula is 1 + 2 + 3. + 50 + 0.225 * 50
1+0.225=1.225 2+0.225=2.225
Similarly, take each item apart
=(1+50)*50/2 +11.25
The integer and the decimal are combined respectively. The integer is solved by the arithmetic sequence. The decimal is the sum of 50 0.225, that is, 0.225 * 50
=1286.25