Question

30.65-(7.65+5.4)请用简便计算！

Answer 1

30.65-7.65+5.4
=32+5.4
=37.4

追答

30.65-7.64+5.7
=32-5.4
=27.4

前面的是错的

Answer 2

30.65-7.65-5.4=23-5.4=27.6

Answer 3

（30.65-7.65）-5.4=17.6

Answer 4

=30.65-7.65-5.4=23-5.4=27.6

Answer 5

30.65-7.65-5.4＝23-5.4＝17.6