Question

zad 1 oblicz

a) 10,6-4(2/3)+16(1/15)=

b)6(1/2)+(3(1/3)-1/2) : 2(5/6)-1(3/4)

c)7,13 : 2,75-1(3/5) to jest w ułamku jest kreska ułamkowa

d)6,5+(3(1/3)-0,5) : 2(1/3) kreska ułmkowa to znak dzielenia

zad 2 znajdz niewidomy skladnik

a)3/4+2/9+x+1(1/4)=4

b)0,87+y+2,13+5/7=8

daje naj to pilnie mi potrzebne

Answer 1

10,6-4 2/3+16 1/15=10 6/10-4 2/3+16 1/15=10 18/30-4 20/30+16 2/30=9 48/30-4 20/30+6 2/30=5 28/30+16 2/30=21 30/30=22

b)6 1/2+(3 1/3-1/2):2 5/6-1 3/4=6 1/2+(3 2/6-3/6)*6/17-1 3/4=6 1/2+(2 5/6*6/17)-1 3/4=6 1/2+1-1 3/4=6 2/4-1 3/4=5 6/4-1 3/4=4 3/4

c)7 13/100:2 75/100-1 3/5=713/100*100/275-1 3/5=713/275-1 3/5=2 163/275-1 3/5=2 163/275-1 165/275=1 438/275-1 165/275=273/275

d)6 5/10+(3 1/3-5/10):2 1/3=6 5/10+(3 10/30-15/30):2 1/3=6 5/10+(2 40/30-15/30):2 1/3=6 5/10+2 25/30*3/7=6 5/10+2 25/30*3/7=6 5/10+2 5/14=6 35/70+2 25/70=8 6/7

zad 2.

a)3/4+2/9+x+1 1/4=4

2+2/9+x=4

x=4-2 2/9

x=1 7/9

b)0,87+y+2,13+5/7=8

3+y+5/7=8

3 5/7+y=8

y=8-3 5/7

y=7 7/7-3 5/7

y=4 2/7

Answer 2

Zad.1

a)

10,6-4(2/3)+16(1/15)=

6,6(2/3)+1 1/15=

4,4+1 1/15=

4 12/30 + 1 2/30=5 14/30=5  7/15

b)

6(1/2)+(3(1/3)-1/2):2(5/6)-1(3/4)=

3+(1-1/2):2(5/6)-1(3/4)=

3,25(5/6)-1(3/4)=

1 11/24 -3/4=

1 11/24 - 18/24=

17/24

c)

7,13:2,75-1(3/5)=

19,6075 - 0,6=

19,0075

d)

6,5+(3(1/3)-0,5):2(1/3)=

6,5+0,25(1/3)=

6,5+1/7=

6 7/14 +2/14=6 9/14

Zad.2

a)

3/4+2/9+x+1 (1/4)=4

27/36 + 8/36 + x + 1/4=4

35/36 + x + 1/4=4

1 2/9+ x=4     I - 1 2/9

x= 2  7/9

b)

0,87+y+2,13+5/7=8

3 5/7 +y=8     I - 3 5/7

y=4 2/7

 

Liczę na naj ;)