Question

递等式计算。能简便的用简便方法。21.6+21.6÷3，7·02一5·9＋2·98

Answer 1

2.16×（1-1/3）＝2.16×2/3＝1.44
7.02+2.98-5.9＝10-5.9＝4.1

Answer 2

21.6+21.6÷3
=21.6+7.2
=28.8

7·02一5·9＋2·98
=7.02+2.98-5.9
=10-5.9
=4.1