( 20,33 + 35,12) x 33 – 45,45 x 23 – 10 x 23

= 55,45 x 33-(45,45 + 10) x 23

=  55,45x 33-55,45 x 77

=  55,45 x ( 33  - 23)

 =  55, 45 x 10 

=  554,5

( 20,33 + 35,12 ) x 33 - 45,45 x 23 - 10 x 23

= 55,45 x 33 - (45,45 + 10) x 23

=  55,45  x 33  -  55,45     x 77

=  55,45  x ( 33  - 23)

=  55, 45 x 10  =  554,5

180360180

\(13\cdot42\cdot33\cdot26\cdot35\)

\(=\left(42\cdot35\right)\cdot\left(13\cdot26\right)\cdot33\)

\(=1470\cdot338\cdot33\)

\(=16396380\)

a,=3/13.17/29.29/34

=3/13.1/2

=3/26

b,=(4/21+25/42).19/33

=11/14.19/33

=19/42

`a, = 3/13 xx (17/29 xx 29/34)`

`= 3/13 xx 1/2`

`= 3/26`.

`b, = 19/33(4/21 + 25/42)`

`= 19/33 xx ( 33/42 )`

`= 19/42`

`a)(3/13xx17/29)xx29/34=3/13xx17/29xx29/34=[3xx17xx29]/[13xx19xx17xx2]=3/26`

`b)4/21xx19/33+25/42xx19/33=19/33xx(4/21+25/42)=19/33xx(8/42+25/42)=19/33xx33/42=19/42`

a) 23*45 -23*35+23*90

= 23* (45-35+90)

= 23*100

= 2300

b) 636/ 6 - 36/ 6

= 600/ 6

= 100

c) 11*607 -607

= 11*607 -607*1

= 607* (11 -1)

= 607*10

= 6070

a) 23 x 45 - 23 x 35 + 23 x 90 

=23 x (45 - 35 + 90)

= 23 x 100

= 2300

b) 636 / 6 - 36 / 6

= (636 - 36) /6

= 600/6

=100

c) 11 x 607 - 607

= 607 x ( 11 - 1)

= 607 x 10

=6070

a) 23*45 -23*35+23*90
= 23* (45-35+90)
= 23*100
= 2300
b) 636/ 6 - 36/ 6
= 600/ 6
= 100
c) 11*607 -607
= 11*607 -607*1
= 607* (11 -1)
= 607*10

= ( 21 + 29) + ( 23 + 27 )

= 50 + 50

= 100

=(21+29)+(23+27)

=50+50

=100

ai k mình mình k lại cho

21+23+29+27

= (21+29)+(23+27)

= 50+50

= 100

20/11*33/23*69/180=20/11*33/23*23/60

a) \(\left(81+19\right)+35=135\)

b) \(\left(78+22\right)+\left(65+135\right)=100+200=300\)

c) \(\left(234+17716\right)+23=17950+23=17973\)

d) \(\left(99+1\right)+85=100+85=185\)

\(a,81+35+19=\left(81+19\right)+35=100+35=135\\ b,78+65+135+22=\left(78+22\right)+\left(65+135\right)=100+200=300\\ c,234+17716+23=\left(234+17716\right)+23=17950+23=17973\\ d,85+99+1=85+\left(99+1\right)=85+100=185\)

A) 81+ 19 +35

=100+35=135

B) 78+65+135+22

=78+22+65+135

100+200=300 

mấy câu cx làm tương tự