\(\dfrac{2}{3}-\dfrac{3}{8}=\dfrac{16}{24}-\dfrac{9}{24}=\dfrac{7}{24}\)
\(\dfrac{3}{7}\times\dfrac{4}{5}=\dfrac{3\times4}{7\times5}=\dfrac{12}{35}\)
\(\dfrac{2}{5}:\dfrac{2}{3}=\dfrac{2}{5}\times\dfrac{3}{2}=\dfrac{6}{10}=\dfrac{3}{5}\)
bài 1 tính
a) 7/9+6/7x4/5
b) 21/23+4/5:6/8
c) 5/8x4/9:2/3
d) 7/12+5/6-21/24
3/11x2=
6/11:3/11=
6/11:2=
2x3/11=
4x2/7=
8/7:2/7=
8/7:4=
2/7x4=
sorry vì hơi dài giúp mik với
3/7x4/5+3/7x2/5-3/7x1/5
C=3/2+3/4+3/8+3/16+...+3/128
D=1/2+1/4+1/8+...+1/1024
E=5/2+5/8+5/32+5/128+5/512+5/2048
1) 1/3 x 1/2 x 3/7 2) 5/4 x 1/3 + 1/7 3) 8 x ( 8/9-2/3 ) 4) 5/6 x 48/20 x 1/2 5) ( 2/5 + 3/4 ) x 8 6) 10 x ( 1/2-1/5 )
2/5+2/3+3/4
2/6+3/12
5/6+1/3
1/3+5/12+5/6
5/8+4/7
1/5+5/35
5/8+3/4
1/6+1/3+1/12
1/6+5/24+2/3
7/3+8/7
2/5+1/6
1/7+1/4+6/7+3/4
giúp với
và ai giải được gọi cụ
2.Tính: 1/3 + 3/5 + 2/3. 2/5 + 3/8 + 3/5.
Tính :
a) 3 / 8 + 2 / 5 + 5 / 8
b) 5 / 7 x 2 / 3 x 14 / 15
c) 3 / 8 + 2 / 5 x 5 / 8
d) 11 / 15 - ( 2/ 3 - 1 / 5 )
Tính :
a) 3 / 8 + 2 / 5 + 5 / 8
b) 5 / 7 x 2 / 3 x 14 / 15
c) 3 / 8 + 2 / 5 x 5 / 8
d) 11 / 15 - ( 2/ 3 - 1 / 5 )
