tính bằng cách thuận tiện nhất : 3+1/9+3/9+2+5/9+3

2 câu trả lời

$\text{3 +}$ $\dfrac{1}{9}$ $\text{+}$ $\dfrac{3}{9}$ $\text{+ 2 +}$ $\dfrac{5}{9}$ $\text{+ 3}$

$\text{= ( 3 + 3 + 2 ) + }$ $\dfrac{1 + 3 + 5}{9}$

$\text{= 8 + 1}$

$\text{= 9}$

‘3+1/9+3/9+2+5/9+3’

‘=(3+2+3)+(1/9+3/9+5/9)’

‘=8+9/9’

=8+1’

‘=9’