a) \(\frac{14}{15}+\frac{3}{11}+\frac{1}{15}+\frac{3}{11}+\frac{10}{22}\)

\(=\left(\frac{14}{15}+\frac{1}{15}\right)+\left(\frac{3}{11}+\frac{3}{11}\right)+\frac{10}{22}\)

\(=1+1+\frac{10}{22}\)

\(=2+\frac{10}{22}\)

\(=\frac{27}{11}\)

b) 9,25 + 9,25 x 8 + 9,25 

= 9,25 x ( 8 + 1 + 1 )

= 9,25 x 10 

= 92,5 

3/11 + 3/11 = 6/11 chứ sao lại ra 1 được nhể?!

a, = \(\left(\frac{14}{15}+\frac{1}{15}\right)+\left(\frac{3}{11}+\frac{3}{11}\right)+\frac{10}{22}\)

=\(1+\frac{6}{11}+\frac{10}{22}\)

=\(2\)

b, tự làm đi nha dễ mà

a) 14/15 + 3/11 + 1/15 + 3/11 + 10/22

= ( 14/15 + 1/15 ) + ( 3/11 + 3/11 + 10/22 )

= 1 + 1

= 2 

b) 9,25 + 9,25 x 8 + 9,25

= 9,25 x ( 1 + 8 + 1)

= 9,25 x 10

= 92,5

a/ \(\frac{14}{15}+\frac{3}{11}+\frac{1}{15}+\frac{3}{11}+\frac{10}{22}=\left(\frac{14}{15}+\frac{1}{15}\right)+\left(\frac{3}{11}+\frac{3}{11}+\frac{2x5}{2x11}\right)=\)

\(=\frac{15}{15}+\frac{11}{11}=1+1=2\)

b/ 9,25+9,25x8+9,25=9,25(1+8+1)=9,25x10=92,5

92,5 nh bn

nhiều thế!

1.a /4 giờ 18 phút + 15 giờ 45 phút =20 giờ 3 phút

  b/12 giờ 34 giây - 5 phút 47 giây = 6 giờ 47 phút

  c/12 giờ 34 phút x 3 =1 ngày 13 giờ 42 phút

  d/ 10 phút 48 giây : 9 = 1 giờ 12 phút

`2.a / 14/15 + 3/11 + 1/15 +3/11 +10/22 =3/11+(14/15 + 1/15) + 10/22

                                                               = 3/11+ 1 + 10/22

                                                               = 4/11 + 10 /22

                                                              = 18/22

 b/9,25 + 9,25 x 8 + 9,25 = 9,25 x (8 + 2)

                                        = 9,25 x 10

                                         = 92,5

Xong rồi nhé.

a)=(14/15+1/15)+(3/11+3/11+5/11)

=1+(3+3+5/11)

=1+1

=2

b) 9,25 + 9,25 x 8 + 9,25

=9,25*(8+1+1)

=9,25*10

=92,5

a) 14/15 + 3/11 + 1/15 + 3/11 + 10/22

= ( 14/15 + 1/15 ) + ( 3/11 + 3/11 + 10/22 )

= 1 + ( 3/11 + 3/11 + 5/11 )

= 1 + 1

=2

b) 9,25 + 9,25 x 8 + 9,25

= 9,25 x 1 + 9,25 x 8 + 9,25 x 1

= 9,25 x ( 1 + 1 + 8 )

= 9,25 x 10

= 92,5

a) 14/15 + 3/11 + 1/15 + 3/11 + 10/22

= ( 14/15 + 1/15 ) + ( 3/11 + 3/11 + 10/22 )

= 1 + ( 3/11 + 3/11 + 5/11 )

= 1 + 1

=2

b) 9,25 + 9,25 x 8 + 9,25

= 9,25 x 1 + 9,25 x 8 + 9,25 x 1

= 9,25 x ( 1 + 1 + 8 )

= 9,25 x 10

= 92,5

Nguồn Phạm Thị Quỳnh

14/15+3/11+1/15+3/11=10/22

=[14/15+1/15]+[3/11+3/11]

=[14/15+1/15]+[3/11*2]

= 1+6/11

=17/11

sai bet!!

a, 84,96 x 12,5 + 42,48 x 9,25 x 2 - 21,24 x 1,75 x 4

= 84,96 x 12,5 + 42,48 x 2 x 9,25 - 21,24 x 4 x 1,75

= 84,96 x 12,5 + 84,96 x 9,25 + 84,96 x 1,75

= 84,96 x ( 12,5 + 9,25 - 1,75 )

= 84,96 x  20

= 1699,2

b, 4,8 x 12,5 + 0,6 x 9,25 x 8 - 2,4 x 1,75 x 2

= 4,8 x 12,5 + 0,6 x 8 x 9,25 - 2,4 x 2 x 1,75

= 4,8 x 12,5 + 4,8 x 9,25 - 4,8 x 1,75

= 4,8 x ( 12,5 + 9,25 - 1,75)

= 4,8 x 20

= 96

Hok tốt !

có zalo ko bạn

a) \(84,96\)x \(12,5\)+ \(42,48\)x \(9,25\)x \(2\)- \(21,24\)x \(1,75\)x \(4\)

\(=84,96\)x \(12,5\)+ \(84,96\)x \(9,25\)- \(84,96\)x \(1,75\)

\(=\)\(84,96\)x ( \(12,5+9,25-1,75\)) \(=84,96\)x \(20\)\(=1699,2\)

b) \(4,8\)x \(12,5\)+ \(0,6\)x \(9,25\)x \(8\)- \(2,4\)x \(1,75\)x \(2\)

\(=4,8\)x \(12,5\)+ \(4,8\)x \(9,25\)- \(4,8\)x \(1,75\)

\(=4,8\)x ( \(12,5+9,25-1,75\)) \(=4,8\)x \(20\)\(=96\)

a. $\dfrac{14}{15}+\dfrac{2}{11}+\dfrac{1}{15}+\dfrac{4}{11}+\dfrac{10}{22}$

$=(\dfrac{14}{15}+dfrac{1}{15})+(\dfrac{2}{11}+\dfrac{4}{11}+\dfrac{10}{22})$

$=1+1=2$

b. $74\times43-43+27\times43$

$=(74-1+27)\times43$

$=100\times43=4300$

\(a)\dfrac{14}{15}+\dfrac{2}{11}+\dfrac{1}{15}+\dfrac{4}{11}+\dfrac{10}{22}\)

\(=\left(\dfrac{14}{15}+\dfrac{1}{15}\right)+\dfrac{2}{11}+\dfrac{4}{11}+\dfrac{5}{11}\)

\(=1+1=2\)

\(b)74\times43-43+27\times43\)

\(=43\times\left(74-1+27\right)\)

\(=43\times100=4300\)

a) \(\dfrac{14}{15}+\dfrac{2}{11}+\dfrac{1}{15}+\dfrac{4}{11}+\dfrac{10}{22}\)

= \(\left(\dfrac{14}{15}+\dfrac{1}{15}\right)+\left(\dfrac{2}{11}+\dfrac{4}{11}\right)+\dfrac{5}{11}\)

= \(1+\dfrac{6}{11}+\dfrac{5}{11}\)

= 2

b) 74 x 43 - 43 + 27 x 43

= 74 x 43 - 43 x 1 + 27 x 43

= 43 x ( 74 - 1 + 27 )

= 43 x 100

= 4300