100+22+33+11+100+33+22= ko nhom van nhanh nhe

2 câu trả lời

`100 + 22 + 33 + 11 + 100 + 33 + 22`

`= ( 100 + 100 ) + ( 22 + 33 ) × 2 + 11`

`= 200 + 55 × 2 + 11`

`= 200 + 110 + 11`

`= 310 + 11`

`= 321`

$\text{100 + 22 + 33 + 11 + 100 + 33 + 22}$

$\text{= (100 + 100) + (22 + 33) + (33 + 22) + 11}$

$\text{= 200 + 55 + 55 + 11}$

$\text{= 200 + 110 + 11}$

$\text{= 310 + 11}$

$\text{= 321}$