555+554+553+552+551+500=2206

chúc bn hok tốt!

lộn

555+554+...+500=29540

chúc bn hok tốt!

Trl 

56/76+65/76=121/76

Hok tốt 

Trl 

31/40+13/40=44/40=11/10

Hok tốt 

Trả lời

566 + 65 = 631

575 - 76 = 499

56 x 64 = 3584

1760 : 32 = 55

Hok tốt

#)Trả lời :

566 + 65 = 631 

575 - 76 = 499

56 x 64 = 3584

1760 : 32 = 55

       #~Will~be~Pens~#

1.9381

2.228,684

3.355,148 :>

đề 1: = 9381

đề 2: = 228684

đề 3 : = 355148

\(\frac{42+y}{72}=\frac{153}{171}\)

\(\Rightarrow\left(42+y\right)\times171=76\times153\)

\(\Rightarrow\left(42+y\right)\times171=11628\)

\(\Rightarrow42+y=11628:171=68\)

\(\Rightarrow y=68-42=26\)

\(\frac{42+y}{76}=\frac{153}{171}\Rightarrow171\left(42+y\right)=153.76\Rightarrow7182+171y=11628\Rightarrow171y=4446\Rightarrow y=26\)

Vậy y = 26

de vay ma ma cung do

1) \(19=\frac{38}{2}=\frac{76}{4}=\frac{95}{5}\)

2) \(1=\frac{3}{3}=\frac{9}{9}=\frac{1000}{1000}\)

~~ Học tốt ~~

ai biết

Là sao dậy cãi nhau hẻ

a)Ta có: \(\frac{1313}{1515}< \frac{1313}{1428}< \frac{1326}{1428}\Rightarrow\frac{1313}{1515}< \frac{1326}{1428}\)

b)Ta có: \(1-\frac{119}{120}=\frac{1}{120}< 1-\frac{118}{119}=\frac{1}{119}\Rightarrow\frac{119}{120}>\frac{118}{119}\)

c)Ta có: \(\frac{222}{555}< \frac{222}{444}< \frac{333}{444}\Rightarrow\frac{222}{555}< \frac{333}{444}\)

A) <

b) >

c) =

=5550 nha

555 x 3 + 555 x 8 - 555

= 555 x 3 + 555 x 8 - 555 x 1

= 555 x ( 3 + 8 - 1)

= 555 x 10

= 5550