Question

Tính nhanh. 61+ 68 x 98 + 7 + 68

Answer 1

`#3107`

`61+ 68 \times 98 + 7 + 68`

`= (61 + 7) + 68 \times 98 + 68`

`= 68 + 68 \times 98 + 68`

`= 68 \times (1 + 1 + 98)`

`= 68 \times 100`

`= 6800`

Answer 2

\(61+68\times98+7+68\)

\(=61+68\times\left(98+7\right)\)

\(=61+68\times105\) 

\(=61+7140\)

\(=7201\)

Answer 3

Mình nhầm nha.