Question

2.14.98+7.4.32-28.30
mn tính hợp lí giúp giùm mình

Answer 1

2 . 14 . 98 + 7 . 4 . 32 - 28 . 30

= 28 . 98 + 28 . 32 - 28 . 30

= 28 . ( 98 + 32 - 30 )

= 28 . 100

= 2800

Answer 2

\(2.14.98+7.4.32-28.30\\ =\left(2.14\right).98+\left(7.4\right).32-28.30\\ =28.98+28.32-28.30\\ =28.\left(98+32-30\right)\\ =28.100\\ =2800\)