Question

Proszę pomuszcie ,mi (działania na ułamkach zwykłych)
zad,1.oblicz.
a)3·3/8
b)3/5·4/7
c)5/16·24
d)2 2/9·3/5
e)3 1/2·2 4/7
f)4 4/5 ·3 3/4
g)4/9:8
h)6:2/3
i)1 1/8:3
j)8 1/3:5/6
k)4 1/5 :2 1/3
l)1 3/8:6 3/5
zad,2.oblicz.
a)11/30+1/6
b)12 2/3+1 3/4
c)8 1/8-2/3
d)7 1/6+ 6 1/8
e)2 1/6 -1 1/2
f)5 1/14-2 1/4-1 3/7

Answer 1

Zad,1.oblicz.

a)3·3/8 = 9/8 = 1 1/8

b)3/5·4/7 = 12/35

c)5/16·24 = 15/2 = 7 1/2

d)2 2/9·3/5 = 20/9 • 3/5 = 4/3 = 1 1/3

e)3 1/2·2 4/7 = 7/2 • 18/7 = 9

f)4 4/5 ·3 3/4 = 24/5 • 15/4 = 3 • 6 = 18

g)4/9:8 = 4/9 • 1/8 = 1/18

h)6:2/3 = 6 • 3/2 = 9

i)1 1/8:3 = 9/8 • 1/3 = 3/8

j)8 1/3:5/6 = 25/3 • 6/5 = 5 • 2 = 10

k)4 1/5 :2 1/3 = 21/5 : 7/3 = 21/5 • 3/7 = 9/5 = 1 4/5

l)1 3/8:6 3/5 = 11/8 : 33/5 = 11/8 • 5/33 = 5/24



zad,2.oblicz.

a)11/30+1/6 = 11/30 + 5/30 = 16/30

b)12 2/3+1 3/4 = 12 8/12 + 1 9/12 = 14 5/12

c)8 1/8-2/3 = 8 3/24 - 16/24 = 7 11/24

d)7 1/6+ 6 1/8 = 7 4/24 + 6 3/24 = 13 7/24

e)2 1/6 -1 1/2 = 2 1/6 - 1 3/6 = 4/6

f)5 1/14-2 1/4-1 3/7 = 5 2/28 - 2 7/28 - 1 12/28 = 1 11/28