Question

13.7*2.2-5.9*2.2+7.8²

Answer 1

13,7*2,2-5,9*2,2+7,8^2
(13.7-5.9)*2.2+7.8^2=7.8*2.2+7.8*7.8=7.8*(2.2+7.8)=7.8*10=78

Answer 2

30.14-12.98+60.84=78