Tính nhanh:
$\frac{204×207+6}{205×205+209}$
Giúp mk gấp.Mk hứa ai đúng vote 5*????????????
Tính nhanh: $\frac{204×207+6}{205×205+209}$ Giúp mk gấp.Mk hứa ai đúng vote 5*????????????
By Alice
By Alice
Tính nhanh:
$\frac{204×207+6}{205×205+209}$
Giúp mk gấp.Mk hứa ai đúng vote 5*????????????
Đáp án:
$\dfrac{204 \times 207 + 6}{205 \times 205 + 209}$
$= \dfrac{204 \times (205+2) + 6}{(204+1) \times 205 + 209}$
$= \dfrac{204 \times 205 + 408 + 6}{204 \times 205 + 205 + 209}$
$= \dfrac{204 \times 205 + 414}{204 \times 205 + 414}$
$= 1$.
$\frac{204.207+6}{205.205+209}$
= $\frac{204.(205+2)+6}{205.205+209}$
= $\frac{204.205+204.2+6}{205.205+209}$
= $\frac{204.205+204+204+6}{205.205+209}$
= $\frac{204.205+(205-1)+210}{205.205+209}$
= $\frac{205.205-1+210}{205.205+209}$
= $\frac{205.205+209}{205.205+209}$
= 1
Chúc học tốt!!!