问题
填空题
(1234+2341+3412+4123)÷5=______.
答案
①(1234+2341+3412+4123)÷5
=[(1234+2341)+(3412+4123)]÷5,
=(3575+7535)×
,1 5
=3575×
+7535×1 5
,1 5
=715+1507,
=2222.
②(1234+2341+3412+4123)÷5,
[(1+2+3+4)×1000+(1+2+3+4)×100+(1+2+3+4)×10+(1+2+3+4)]÷5
=1000×10÷5+100×10÷5+10×10÷5+10÷5,
=2222.
故答案为:2222.