3/4 x 7/12 + 3/4 x 1/6 + 3/4 x 1/4

=3/4 x (7/12 + 1/6 + 1/4)

=3/4 x (7/12 + 2/12 + 3/12)

=3/4 x 1

=3/4

Chúc học tốt~

3/4x7/12+3/4x1/6+3/4x1/4=3/4x(7/12+1/6+1/4)=3/4x1=3/4

cam on

= { 1/3 + 2/3 + 4/3 } + { 5/12 + 1/12 }

=7/3 + 6/12 = 102/36

Rút gọn = 51/18

= ( 1/3 + 2/3 + 4/3 ) + ( 5/12 + 1/12 )

= 7/3 + 6/12

= 28/12 + 6/12

= 34/12 = 17/6

\((\frac{1}{2}+\frac{1}{4}+\frac{1}{6}) \)x \((\frac{36}{9}-\frac{12}{9}:\frac{1}{3}) \)

\(= (\frac{1}{2}+\frac{1}{4}+\frac{1}{6}) \) x \((\frac{36}{9}-\frac{36}{9})\)

\( = (\frac{1}{2}+\frac{1}{4}+\frac{1}{6}) \) x \(0\)

\(= 0\)

\(=\dfrac{1}{3}+\dfrac{1}{4}+\dfrac{1}{5}+\dfrac{4}{5}+\dfrac{2}{3}+\dfrac{1}{4}\)

=(1/3+2/3)+(1/4+1/4)+(1/5+4/5)

=1+1+1/2

=5/2

\(\dfrac{5}{2}\)

1 Tính
7/12 - 2/7 + 1/12= (7/12-1/12)+2/7=6/12+2/7=1/2+2/7=7/14+4/14=11/14
12/17-5/17-4/17= 12-5-4/17=3/17

2a, 7/11+3/4+4/11+1/4= (7/11+4/11)+3/4+1/4=11/11+4/4=1+1=2
b)72/99-28/99-14/99= (72-28-14)/99=30/99=10/33

c)69,78+35,97+30,22= (69,78+30,22)+35,97=100+35,97=135,97

d) 83,45-30,98-42,47=83,45-(30,98+42,47)=83,45-73,45=10     

\(\frac{1}{2}+\frac{2}{4}+\frac{3}{6}+\frac{4}{8}+\frac{5}{10}+\frac{6}{12}\)

\(=\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}+\frac{1}{2}\)

\(=6\times\frac{1}{2}=3\)

= 3 nhé

tích mik nha

\(=\dfrac{11}{12}\left(\dfrac{2}{7}+\dfrac{4}{7}+\dfrac{1}{7}\right)=\dfrac{11}{12}\cdot1=\dfrac{11}{12}\)

=11/12

11/12 nha

a: 3km75m=3,075m

\(\dfrac{1}{4}m^2=25dm^2\)

3h15'=195p

b: 26320:35=752

c: =3/5(5/12+7/12)

=3/5

a, \(3km75m=3075m\)

\(\dfrac{1}{4}m^2=25\text{d}m^2\)

`3` giờ `15` phút = `195` phút

b,

`->26320 : 35=752.`

c, \(\dfrac{9}{15}\times\dfrac{5}{12}+\dfrac{9}{15}\times\dfrac{7}{12}=\dfrac{9}{15}\times\left(\dfrac{5}{12}+\dfrac{7}{12}\right)=\dfrac{9}{15}\times1=\dfrac{9}{15}\)

`@mt`