Question

脱式计算79×42+79+79×50怎么写？

Answer 1

79×42+79+79×50
=79×（42+1+50）
=79×83
=6557

Answer 2

79×42+79+79×50
=79×（42+1+50）
=79×93
=80×93-79
=7440-79
=7361