Phép trừ phân số (tiếp theo)

9/7-6/5=3/35

Cảm ơn các bạn

\(\dfrac{10}{2}-\dfrac{12}{22}=\dfrac{110}{22}-\dfrac{12}{22}=\dfrac{98}{22}=\dfrac{49}{11}\)

10/2 -22/12

= 60/12 - 22/12

= 48/12

= 4

\(\dfrac{10}{2}-\dfrac{22}{12}=\dfrac{60}{12}-\dfrac{22}{12}=\dfrac{38}{12}=\dfrac{19}{6}\)

\(1-\dfrac{15}{18}=\dfrac{18}{18}-\dfrac{15}{18}=\dfrac{3}{18}=\dfrac{1}{6}\)

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

1/6

\(\dfrac{11}{21}=\dfrac{1}{2}+\dfrac{1}{42}\)

đề sai rồi x đâu

Tìm x nhưng ko có x

nhầm 23/69-x=17/153

b: 5/6-3/8=11/24

c: 8/7-2/3=24/21-14/21=10/21

d: 5/3-3/5=25/15-9/15=16/15

B) \(\dfrac{5}{6}-\dfrac{3}{8}=\dfrac{40}{48}-\dfrac{18}{48}=\dfrac{22}{48}=\dfrac{11}{24}\)

C) \(\dfrac{8}{7}-\dfrac{2}{3}=\dfrac{24}{21}-\dfrac{14}{21}=\dfrac{10}{21}\)

D) \(\dfrac{5}{3}-\dfrac{3}{5}=\dfrac{25}{15}-\dfrac{9}{15}=\dfrac{16}{15}\)

a:=5/4-3/4=2/4=1/2

b: =2/3-2/5=10/15-6/15=4/15

c: =10/12-9/12=1/12

d: =4/3-1/4=16/12-3/12=13/12

\(a,=\dfrac{5}{4}-\dfrac{3}{4}=\dfrac{2}{4}\\ b,=\dfrac{30}{45}-\dfrac{18}{45}=\dfrac{12}{45}\\ c,=\dfrac{10}{12}-\dfrac{9}{12}=\dfrac{1}{12}\\ d,=1\dfrac{1}{12}\)

\(a,\dfrac{20}{16}-\dfrac{3}{4}=\dfrac{5}{4}-\dfrac{3}{4}=\dfrac{2}{4}=\dfrac{1}{2}\\ b,\dfrac{30}{45}-\dfrac{2}{5}=\dfrac{2}{3}-\dfrac{2}{5}=\dfrac{10}{15}-\dfrac{6}{15}=\dfrac{4}{15}\\ c,\dfrac{10}{12}-\dfrac{3}{4}=\dfrac{5}{6}-\dfrac{3}{4}=\dfrac{10}{12}-\dfrac{9}{12}=\dfrac{1}{12}\\ d,\dfrac{12}{9}-\dfrac{1}{4}=\dfrac{4}{3}-\dfrac{1}{4}=\dfrac{16}{12}-\dfrac{3}{12}=\dfrac{13}{12}\)

Diện tích trồng cây xanh bằng :

\(\dfrac{6}{7}-\dfrac{2}{5}=\dfrac{16}{35}\)

Tham khảo

Diện tích trồng hoa bằng:

      6/7 - 2/5 = 16/35 (diện tích của công viên)

             Đáp số : 16/35 diện tích của công viên

 diện tích để trồng cây xanh là:

\(\dfrac{6}{7}-\dfrac{2}{5}=\dfrac{16}{35}\left(ph\text{ần}\right)\) 

a: 6/5-2/3=18/15-10/15=8/15

b: 9/7-5/8=72/56-35/56=37/56

c: 7/6-3/4=14/12-9/12=5/12

d: 9/8-8/9=81/72-64/72=17/72

e: 7/5-7/6=7(1/5-1/6)=7/30

f: 3/4-2/5=15/20-8/20=7/20

g: 4/7-5/6=24/42-35/42=-11/41

i: 6/13-5/11=66/143-65/143=1/143

k: 1-4/5=1/5

m: 2-5/9=18/9-5/9=13/9

n: 3-9/5=15/5-9/5=6/5

p: 4-3/4=16/4-3/4=13/4

a) \(\dfrac{6}{5}-\dfrac{2}{3}=\dfrac{18}{15}-\dfrac{10}{15}=\dfrac{8}{15}\)

b) \(\dfrac{9}{7}-\dfrac{5}{8}=\dfrac{72}{56}-\dfrac{35}{56}=\dfrac{37}{56}\)

c) \(\dfrac{7}{6}-\dfrac{3}{4}=\dfrac{28}{24}-\dfrac{18}{24}=\dfrac{10}{24}=\dfrac{5}{12}\)

d) \(\dfrac{9}{8}-\dfrac{8}{9}=\dfrac{81}{72}-\dfrac{64}{72}=\dfrac{17}{72}\)

e) \(\dfrac{7}{5}-\dfrac{7}{6}=\dfrac{42}{30}-\dfrac{35}{30}=\dfrac{7}{30}\)

h) \(\dfrac{4}{7}-\dfrac{5}{6}=\dfrac{24}{42}-\dfrac{35}{42}=-\dfrac{11}{42}\)

i) \(\dfrac{6}{13}-\dfrac{5}{11}=\dfrac{66}{143}-\dfrac{65}{143}=\dfrac{1}{143}\)

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

m) \(2-\dfrac{5}{9}=\dfrac{18}{9}-\dfrac{5}{9}=\dfrac{13}{9}\)

n) \(3-\dfrac{9}{5}=\dfrac{15}{5}-\dfrac{9}{5}=\dfrac{6}{5}\)

p) \(4-\dfrac{3}{4}=\dfrac{16}{4}-\dfrac{3}{4}=\dfrac{13}{4}\)

Diện tích trồng cây xanh bằng \(\dfrac{6}{7}-\dfrac{2}{5}=\dfrac{16}{35}\)(Diện tích công viên)

Diện tích trồng cây xanh là:

6/7x3/5=18/35(phần)

18/35 phần