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×

1
5
+7535×
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.

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