计算题:1÷〔1×4〕+1÷〔4×7〕+1÷〔7×10〕+……+1÷〔97×100〕 怎样计算?

问题描述:

计算题:1÷〔1×4〕+1÷〔4×7〕+1÷〔7×10〕+……+1÷〔97×100〕 怎样计算?

=1/3*(1-1/4+1/4-1/7+……+1/94-1/97+1/97-1/100)
=1/3*(1-1/100)
=1/3*99/100
=33/100