Đáp án: A

368 + 764 - 363 - 759

= (368-363)+(764-759)

= 5 + 5 =10

Đáp án cần chọn là: A

Ta có (368+764)−(363+759)= 1132–1122=10

 ( 764 - 759 ) + ( 368 - 369 ) 

= 5 - 5 = 10 

b) ( 4172 - 4168 ) - (1873 - 1869 ) 

= 4-4 = 0

a) 100 - 95 + 90 - 85 + 89 -75 + 70 - 65 = 5 + 90 = 95 - 85 = 10 + 89 = 99 - 75 = 24 + 70 = 94 - 65 = 29

b) 24 x 25 x 26 = 600 x 26 = 15600

c) ( 368 + 764 ) - ( 363 + 759 ) = 1132 - 1122 = 10

Đáp Án cần cho bn  nào chưa biết 

a)100-95+90-85+80-75+70-65

 = 5 + 5 + 5 + 5

= 5 x4= 20

b)24x 25 x26

=(4 x6)x ( 5x 5)x (2x13)

=(4x2)x (6x5)x(5x13)

=240x 65= 15600

c)(368+764)-(363+759)

=(764-759) + (368-363)

= 5+ 5=10

\(=368+764-368-759=\left(368-368\right)+\left(764-759\right)=0+5=5\)

\(\left(368+764\right)-\left(368+759\right)\)

\(=368+764-368-759\)

\(=\left(368-368\right)+\left(764-759\right)\)

\(=0+5=5\)

A) \(\frac{7}{8}-\frac{5}{12}=\frac{84}{96}-\frac{40}{96}=\frac{44}{96}=\frac{11}{24}\)

B)\(\frac{8}{15}-\frac{2}{5}=\frac{8}{15}-\frac{6}{15}=\frac{2}{15}\)

C)\(\frac{5}{6}-\frac{3}{10}=\frac{50}{60}-\frac{18}{60}=\frac{32}{60}=\frac{8}{15}\)

D)\(\frac{7}{10}-\frac{1}{5}=\frac{7}{10}-\frac{2}{10}=\frac{5}{10}=\frac{1}{2}\)

2)A)\(\frac{5}{10}-\frac{2}{15}=\frac{1}{2}-\frac{2}{15}=\frac{15}{30}-\frac{4}{30}=\frac{11}{30}\)

B)\(\frac{5}{20}-\frac{1}{6}=\frac{1}{4}-\frac{1}{6}=\frac{6}{24}-\frac{4}{24}=\frac{2}{24}=\frac{1}{12}\)

C)\(\frac{6}{18}-\frac{6}{24}=\frac{1}{3}-\frac{1}{4}=\frac{4}{12}-\frac{3}{12}=\frac{1}{12}\)

D)\(\frac{5}{9}-\frac{3}{12}=\frac{5}{9}-\frac{1}{4}=\frac{20}{36}-\frac{9}{36}=\frac{11}{36}\)

Chúc bạn học tốt

A) \(\dfrac{5}{10}-\dfrac{2}{15}\)

\(=\dfrac{1}{2}-\dfrac{2}{15}\)

\(=\dfrac{15}{30}-\dfrac{4}{30}\)

\(=\dfrac{11}{30}\)

B)\(\dfrac{5}{20}-\dfrac{1}{6}\)

\(=\dfrac{1}{4}-\dfrac{1}{6}\)

\(=\dfrac{6}{24}-\dfrac{4}{24}\)

\(=\dfrac{2}{24}=\dfrac{1}{12}\)

C) \(\dfrac{6}{18}-\dfrac{6}{24}\)

\(=\dfrac{1}{3}-\dfrac{1}{4}\)

\(=\dfrac{4}{12}-\dfrac{3}{12}\)

\(=\dfrac{1}{12}\)

D) \(\dfrac{5}{9}-\dfrac{3}{12}\)

\(=\dfrac{5}{9}-\dfrac{1}{4}\)

\(=\dfrac{20}{36}-\dfrac{9}{36}\)

\(=\dfrac{11}{36}\).

a: =1/2-2/15

=15/30-4/30

=11/30

b: =1/4-1/6

=3/12-2/12

=1/12

c: =1/3-1/4

=1/12

d: =20/36-9/36

=11/36

a=240

b=45

c=-1700