Question

3分之4加9又3分之2加99又3分之2加999又3分之2加9999又3分之2这道题怎样计算

Answer 1

上式= 4/3 + (10 - 1/3) + (100 - 1/3) + (1000 - 1/3) + (10000 - 1/3)

=4/3 -4/3 +10+100+1000+10000

=11110