=0.26+0.9+0.41+24=1.16+0.41+24=1.57+24=25.57

Sai 

Kết quả ra 1

a, \(\dfrac{90}{37}-\dfrac{38}{25}-\dfrac{8}{25}-\dfrac{4}{25}\)

= \(\dfrac{90}{37}\) - \(\dfrac{38+8+4}{25}\)

= \(\dfrac{90}{37}\) - 2

= \(\dfrac{16}{37}\)

\(\dfrac{24}{29}\) + \(\dfrac{32}{41}\) + \(\dfrac{34}{29}\) + \(\dfrac{50}{41}\)

=(\(\dfrac{24}{29}\) + \(\dfrac{34}{29}\)) + (\(\dfrac{32}{41}\) + \(\dfrac{50}{41}\))

= \(\dfrac{58}{29}\) + \(\dfrac{82}{41}\)

= 2 + 2

= 4

c, \(\dfrac{73}{24}\) - \(\dfrac{22}{29}\) - \(\dfrac{25}{24}\) + \(\dfrac{51}{29}\)

= ( \(\dfrac{73}{24}\) - \(\dfrac{25}{24}\)) +( \(\dfrac{51}{29}\) - \(\dfrac{22}{29}\))

= \(\dfrac{48}{24}\) + \(\dfrac{29}{29}\)

= 2 + 1

= 3

= 26% + 9% + 41% + 24%

= 100%

= 1 

= 1 

\(\frac{13}{50}+9\%+\frac{41}{100}+\frac{24}{100}\)

\(=\frac{26}{100}+\frac{9}{100}+\frac{41}{100}+\frac{24}{100}\)

\(=\frac{26+9+41+24}{100}=\frac{100}{100}=1\)

= 1 nha

1

Trả lời

a)4/5.9/7-4/5.3/14

=4/5(9/7-3/14)

=4/5(18/14-3/14)

=4/5.15/14

=6/7

b)13/50+9%+41/100+24%

=13/50+9/100+41/100+24/100

=26+9+41+24/100

=(26+24)+(9+41)/100

=100/100

=1

\(\frac{4}{5}\cdot\frac{9}{7}-\frac{4}{5}\cdot\frac{3}{14}\)

=\(\frac{4}{5}\cdot(\frac{9}{7}-\frac{3}{14})\)

=\(\frac{4}{5}\cdot\frac{15}{14}\)

=\(\frac{6}{7}\)

b,\(\frac{13}{50}\)+9%+\(\frac{41}{100}\)+24%

=26%+9%+41%+24%

=100%=1

ai làm câu C giúp mình đi

\(\dfrac{13}{45}\times\dfrac{15}{34}\times\dfrac{51}{91}\)

\(=\dfrac{13\times15\times51}{45\times34\times91}\)

\(=\dfrac{13\times15\times3\times17}{15\times3\times2\times17\times13\times7}\)

\(=\dfrac{1}{2\times7}\)

\(=\dfrac{1}{14}\)

B3:

a. =-1250000

b. =-20000

c. =0

d. =-24000

B4:

a. =-4100

b. =-2700

c. =400

d. =1007

13/50+9%+41/100+24%

=26/100+9/100+41/100+24/100

=26/100+24/100+9/100+41/100

=50/100+50/100

=100/100=1

= 26/100 + 9/100 + 41/100 + 24/100

= ( 26/100 + 24/100 ) + ( 9/100 + 41/100 )

=            50/100          +          50/100

=                            100/100

=                                 1

\(\dfrac{13}{50}+9\%+\dfrac{41}{100}+0,24\)

\(\dfrac{13}{50}+\dfrac{9}{100}+\dfrac{41}{100}+\dfrac{24}{100}\)

\(\dfrac{13}{50}+\left(\dfrac{9+41+24}{100}\right)\)

\(\dfrac{13}{50}+\dfrac{74}{100}\)

\(\dfrac{26}{100}+\dfrac{74}{100}=\dfrac{100}{100}=1\)

=(13/50+0,24)+(9%+41/100)

=1/2+(9/100+41/100)

=1/2+1/2

=1

\(=\dfrac{26}{100}+\dfrac{9}{100}+\dfrac{41}{100}+\dfrac{24}{100}=\dfrac{100}{100}=1\)