A)(3/4 - 1/5):1/2 =
b)3,2:(0,8-2/5) =
c)2/3 × (1/2-1/6) =
d)4,8 + 1/3 × (1,2-0,6) =
e)(1 - 7/9) × (5,2-0,7) =
f)123:10 + 0,2 × 6,1 =

Zad. 53
a)2/5 × 5 + 1/3 =
b)3+2 × 2/5 =
c)3/4 + 1/4 × 8 =
d)8 × (1/4 + 0,25)
e)1,6 - 0,6:2 =
f)5 1/2 - 1/5 × 10 =

Błagam o pomoc! <prosi>

2

Odpowiedzi

2009-10-06T21:15:52+02:00
A)(3/4 - 1/5):1/2 =(15/20-4/20):1/2=11/20:1/2=11/20*2/1=1 1/10
b)3,2:(0,8-2/5) =3,2:(4/5-2/5)=32/10:2/5=32/10*5/2=16/5=3 1/5
c)2/3 × (1/2-1/6) =2/3*2/6=2/9
d)4,8 + 1/3 × (1,2-0,6) =48/10+1/3*6/10=48/10+2/10=5
e)(1 - 7/9) × (5,2-0,7) =2/9*45/10=1
f)123:10 + 0,2 × 6,1 = 12,3+1,22=13,52

Zad. 53
a)2/5 × 5 + 1/3 =2+1/3=2 1/3
b)3+2 × 2/5 =3 4/5
c)3/4 + 1/4 × 8 = 2 3/4
d)8 × (1/4 + 0,25) = 4
e)1,6 - 0,6:2 =1,3
f)5 1/2 - 1/5 × 10 = 3 1/2
2009-10-06T21:35:19+02:00
A)(3/4 - 1/5):1/2 =
=(15/20-4/20):1/2=
=11/20:1/2=
=11/20*2/1=
=1i 1/10
b)3,2:(0,8-2/5) =
=3,2:(4/5-2/5)=
=32/10:2/5=
=32/10*5/2=
=16/5=
=3 i1/5
c)2/3 × (1/2-1/6) =
=2/3*2/6=
=2/9
d)4,8 + 1/3 × (1,2-0,6) =
=48/10+1/3*6/10=
=48/10+2/10=
=5
e)(1 - 7/9) × (5,2-0,7) =
=2/9*45/10=
=1
f)123:10 + 0,2 × 6,1 =
=12,3+1,22=
=13,52

Zad. 53
a)2/5 × 5 + 1/3 =
=2+1/3=
=2 i 1/3
b)3+2 × 2/5 =3 i4/5
c)3/4 + 1/4 × 8 = 2 i3/4
d)8 × (1/4 + 0,25) = 4
e)1,6 - 0,6:2 =1,3
f)5 1/2 - 1/5 × 10 = 3 i1/2