Question

77×27＋23×27+77×59＋23×59如何简便运算？

Answer 1

77*27+23*27+77*59+23*59
=27*（77+23）+59*（77+23）
=27*100+59*100
=2700+5900
=8600

Answer 2

77×27＋23×27+77×59＋23×59
=(77+23)*27+(77+23)*59
=(77+23)*(27+59)
=100*86
=860

Answer 3

根本就看不懂吗