来自葛树恩的问题
计算:1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19=______.
计算:1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19=______.
1回答
2020-10-03 02:07
计算:1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19=______.
计算:1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19=______.
1.1+3.3+5.5+7.7+9.9+11.11+13.13+15.15+17.17+19.19
=1.1×(1+3+5+7+9)+1.01×(11+13+15+17+19)
=1.1×25+1.01×75
=103.25.