123 + 698 + 77 + 2
= ( 123 + 77 ) + ( 698 + 2 )
= 200 + 700
= 900
#Hok_tốt
( 123 + 77 ) + ( 698 + 2 )
200 + 700
900
= (123+77)+(698+2)
=200+700
=900
\(123+698+77+2\)
\(=\left(123+77\right)+\left(698+2\right)\)
\(=200+700\)
\(=900\)
123 + 698 + 77+ 2
= (123 + 77) + (698 + 2)
= 200 + 700
= 900
123 + 698 + 77 + 2
= (123 + 77) + (698 + 2)
= 200 + 700
= 900
~Std well~
#Lâm