Question

631+82+69怎样简便计算？

Answer 1

631+82+69
=(631+69)十82
=700+82
=782

Answer 2

631+82+69
＝（631+69）+82
＝700+82
＝782

Answer 3

解：631+82+69
＝（631+69）+82
＝700+82
=782

Answer 4

631+82+69
＝631+69+82
＝700+82
＝782

Answer 5

原式=（631+69）+82
=700+82
=782