100 + 700 + 200 =1000
600 + 100 + 300 = 1000
100+700+200= 1000
600+100+300=1000
100 + 700 + 200
= ( 1 + 7 + 2 ) x 100
= ( 8 + 2 ) x 100
= 10 x 100
= 1000
__________________
600 + 100 + 300
= ( 6 + 1 + 3 ) x 100
= ( 7 + 3 ) x 100
= 10 x 100
= 1000
__________________________
NHỚ TÍCK NHA
___________________________
100+700+200=1000
600+100+300=1000
tk nhé Thảo
100 + 700 + 200
= ﴾ 1 + 7 + 2 ﴿ x 100
= ﴾ 8 + 2 ﴿ x 100
= 10 x 100
= 1000
__________________
600 + 100 + 300
= ﴾ 6 + 1 + 3 ﴿ x 100
= ﴾ 7 + 3 ﴿ x 100
= 10 x 100
= 1000