Question

Rút gọn rồi tính:

a) 2/3 - 3/9 ;       b) 7/5 - 15/25 ;           c) 3/2 - 4/8 ;             d) 11/4 - 6/8 .

Answer 1

a)1/3

b)4/5

c)1

d)2 nha

Answer 2

a)=2/3-1/3= 1/3

b)=7/5-3/5= 4/5

c)=3/2-1/2= 2/2=1

d)=11/4-3/4= 8/4= 2

Answer 3

a) \(\frac{2}{3}-\frac{3}{9}=\frac{2}{3}-\frac{1}{3}=\frac{1}{3}\)

b) \(\frac{7}{5}-\frac{15}{25}=\frac{7}{5}-\frac{3}{5}=\frac{4}{5}\)

c) \(\frac{3}{2}-\frac{4}{8}=\frac{3}{2}-\frac{1}{2}=1\)

d) \(\frac{11}{4}-\frac{6}{8}=\frac{11}{4}-\frac{3}{4}=2\)

Answer 4

a) \(\frac{2}{3}-\frac{3}{9}=\frac{2}{3}-\frac{1}{3}=\frac{1}{3}\)

b) \(\frac{7}{5}-\frac{15}{25}=\frac{7}{5}-\frac{3}{5}=\frac{2}{5}\)

c) \(\frac{3}{2}-\frac{4}{8}=\frac{3}{2}-\frac{1}{2}=1\)

d) \(\frac{11}{4}-\frac{6}{8}=\frac{11}{4}-\frac{3}{4}=2\)

@muối

Answer 5

TL

2/3 -3/9=2/3-1/3=1/3

7/5-15/25=7/5-3/5=4/5

3/2-4/8=3/2-1/2=1

11/4-6/8=11/4=3/2=3

nha bn

HT

Answer 6

a) 2/3-3/9=2/3-1/3=1/3

b) 7/5-15/25=7/5-3/5=4/5

c) 3/2-4/8=3/2-1/2=2/2=1

d) 11/4-6/8=11/4-3/4=8/4=2/1=2

Answer 7

TL:

a) 2/3 - 3/9 

2/3 - 1/3 = 1/3 

b) 7/5 - 15/25 

7/5 - 3/5 = 4/5 

c) 3/2 - 4/8 

3/2 - 1/2 = 1 

d) 11/4 - 6/8 

= 11/4 - 3/4 

= 7/4 

HT