2468x站长推介

1、2468x13579

3

2、计算:1234x234 2468x383

1234x234+2468x383
=1234x(234+2x383)
=1234x(234+766)
=1234x1000
=1234000

3、规定a▽3=a+aa+aaa,已知2▽x=2468,求x

2▽x=2468
2+22+22+2222=2468
x=4