\(2018\times\left(\frac{1}{2}+\frac{1212}{2424}\right)=2018\times\left(\frac{1}{2}+\frac{12}{24}\right).\)

                                                  \(=2018\times\left(\frac{1}{2}+\frac{1}{2}\right)\)

                                                  \(=2018\times1=2018\)

2018.(1/2+1212/2424)

=2018.(1/2+1/2)

=2018.2/2

=2018.1

=2018

Hk tốt

\(2018\times\left(\frac{1}{2}+\frac{1212}{2424}\right)\)

\(=2018\times\left(\frac{1}{2}+\frac{1}{2}\right)\)

\(=2018\times1=2018\)

~ Hok tốt ~

\(\frac{121212}{141414}\times\frac{1313}{1212}\times\frac{2424}{2424}\)

\(=\frac{6}{7}\times\frac{13}{12}\times1\)

\(=\frac{13}{14}\)

~ Hok tốt ~

kết quả là ; 1313/141414

sau nhắc mik

=12. 10101/ 14.10101 .   13.101/12.101.   1

rút gọn ta được: 13/14

hok tốt

kt

=2018

Chi tiết

2018X(1/2+1212/2424)

Rút gon 1212/2424 còn 1/2

1/2+1/2=1

Vậy 2018x1=2018

\(=2018\) x \(\left(\dfrac{1}{2}+\dfrac{1}{2}\right)\)

\(=2018\) x \(1=2018\)

= 2018

\(2018.\frac{1212}{2424}=2018.\frac{1212:1212}{2424:1212}=2018.\frac{1}{2}=1009\)

~Study well~

#ARMY_BLINK#

Trả lời:

2018 * ( 1212/2424 )

= 2018 * 1/2

= 1009

~~GOD~~

\(2018x\frac{1212}{2424}=2018x\frac{1212:1212}{2424:2424}=2018x\frac{1}{2}=1009\)

MAGCIEPCNIL

HÃY LUÔN ;-)

a, \(\dfrac{3}{5}\) \(\times\) \(\dfrac{6}{7}\) + \(\dfrac{3}{5}\) : 7 + \(\dfrac{6}{5}\)

= \(\dfrac{3}{5}\) \(\times\) \(\dfrac{6}{7}\) + \(\dfrac{3}{5}\) \(\times\) \(\dfrac{1}{7}\) + \(\dfrac{6}{5}\)

= \(\dfrac{3}{5}\) \(\times\) ( \(\dfrac{6}{7}\) + \(\dfrac{1}{7}\)) + \(\dfrac{6}{5}\)

= \(\dfrac{3}{5}\) + \(\dfrac{6}{5}\)

= \(\dfrac{9}{5}\) 

b, 2018 \(\times\) ( \(\dfrac{1}{2}\) + \(\dfrac{1212}{2424}\))

= 2018 \(\times\) ( \(\dfrac{1}{2}\) + \(\dfrac{1}{2}\))

= 2018 \(\times\)1

= 2018

a) 3/5 x 6/7 + 3/5 x 1/7 + 6/5

3/5 x ( 6/7 + 1/7 ) + 6/5

3/5 x 7/7 + 6/5 

3/5 x 1 + 6/5

3/5 + 6/5 

9/5

b) 2018 x ( 1/2 + 1212/ 2424 )

2018 x ( 1/2 + 12/24 )

2018 x ( 1/2 + 1/2 )

2018 x 2/2

2018 x 1

2018

Học tốt

Ta có:

  \(\frac{1212}{2424}=\frac{1}{2}\)

\(\Rightarrow2018.\left(\frac{1}{2}+\frac{1}{2}\right)=2018.1=2018\)

chia 101/101 để ra được 1/2

1212+2121+4242+2424

=1212+2121+2121+2121+1212+1212

=(1212+2121)+(2121+1212)+(1212+2121)

=3333+3333+3333

=3333 x 3 =9999

1212+2121+4242+2424=

=3333+6666

=9999

\(\frac{2323+1313+1414+1515+1616}{4141+2222+2323+2424+2525}\)

=\(\frac{8181}{13635}\)

18180,8               

a )   − 1212 − 2424 = ( − 1212 ) : ( − 1212 ) ( − 2424 ) : ( − 1212 ) = 1 2

b )   120120 − 240240 = 120120 : ( − 120120 ) − 240240 : ( − 120120 ) = − 1 2

c)  1313 − 1414 = 1313 : ( − 101 ) − 1414 : ( − 101 ) = − 13 14