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
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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
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 ;)