Question

obliczcie mi:

19- 3/4*6 2/7

5/6 podzielic (1 3/4 + 2 1/2)

3,5*1/5+2/7*0,84

(4 1/3- 2 1/6)podzielic 1 5/8

6,4 podzielic 2 2/15*(6,2+4,8)

2 1/2 +3* (6,2+4,8)

Answer 1

obliczcie mi:

19- 3/4*6 2/7 =

= 19 -3/4*(44/7) =

= 19 -  33/7 =

= 133/7 - 33/7 =

= 100/7 =

= 14 i 2/7

 

5/6 podzielic (1 3/4 + 2 1/2)=

= (5/6):( 7/4 + 5/2) =

= (5/6): ( 7/4 + 10/4) =

= (5/6) : (17/4) =

= (5/6) *(4/17) =

= 10/51

 

3,5*1/5+2/7*0,84 =

= (7/2)*(1/5) + (2/7)*(84/100) =

= (7/10) + (12/50) =

= (35/50) + (12/50)=

= 47/50

 

(4 1/3- 2 1/6)podzielic 1 5/8=

=[(13/4) - 13/6) : (13/8) =

= ( 39/12 - 26/12) * (8/13) =

= (13/12)*(8/13) =

=  2/3

 

6,4 podzielic 2 2/15*(6,2+4,8)=

= (64/10): (32/15)* (11) =

= (32/5)*(15/32) *(11) =

= 3* 11=

= 33

 

2 1/2 +3* (6,2+4,8)=

=(5/2) + 3*(11) =

=  2,5 + 33 =

=  35,5

Answer 2

19-3/4*6 2/7= 19- 3/4*44/7= 19- 33/7= 19-4 5/7= 14 2/7

 

5/6:(1 3/4+2 1/2)= 5/6:(1 3/4+2 2/4)= 5/6:3 5/4= 5/6:17/4= 5/6*4/17= 10/51

 

3,5*1/5+2/7*0,84= 3 1/2*1/5+2/7*84/100= 7/2*1/5+12/50= 7/10+12/50= 35/50+12/50= 47/50

 

(4 1/3-2 1/6):1 5/8= (4 2/6-2 1/6):13/8= 2 1/6:13/8= 13/6*8/13= 4/3= 1 1/3

 

6,4:2 2/15*(6,2+4,8)= 6 2/5:2 2/15*11= 32/5:32/15*11= 32/5*15/32*11= 3*11= 33

 

2 1/2+3*(6,2+4,8)= 2,5+3*11= 2,5+33= 35,5