2002.13*13/(78/12)*50简便计算2002.13×13÷（78÷12）×50

=2002.13乘13除78乘12乘50
=2002.13乘2乘50
=2002.13乘100
=200213

13/(78/12)*50=50*13*12/(13*6)=50*2=100

所以 2002.13*13/(78/12)*50=2002.13*100=200213

2002.13×13/（78/12）×50
=20020.13×[(13×12/78)×50]
=2002.13×[(78×2/78)×50]
=2002.13×[2×50]
=2002.13×100
=200213
2002.13×13÷（78÷12）×50
=2002.13×[13×12÷78×50]
=2002.13×[78×2÷78×50]
=2002.13×[2×50]
=2002.13×100
=200213

题能再明白点吗
2002.13×13÷（78÷12）×50
=2002.13×13÷（78/12）×50
=2002.13×13×（12/78）×50
=2002.13×【13×（12/78）】×50
=2002.13×2×50
= 2002.13×(2×50)
=2002.13×100
=200213