Question

简便计算

Answer 1

(3.8十4.2)+(4.29+2.71)
=8+7
=15

追答

14 算错了

15 是正确答案

Answer 2

(4.29+2.71)+(2.8+4.2)=7+7=14

Answer 3

(4.29+4.71)+4.29=9+4.71=13.71

Answer 4

等于（3.8+4.2）+（4.9+2.71）等于8+7等于15

Answer 5

(3.8+4.2)+(4.29+2.71)

Answer 6

(3.8+4.2)+(4.29+2.71)