Question

zad.1

Napisz 4 różne ułamki równe 2/3

zad.2

Oblicz

a)1/2+3/4= b)9 1/3+5 2/11+3 2/3=

zad.3

Oblicz

a)7 2/3+2 5/6= b)1 1/3+2 3/4= c)1 3/4+2 3/10=

zad.4

Oblicz

7 5/9-2 1/2+1 5/6-1 17/18=

(2 1/6-1 5/12)+(2 7/8-1 5/6)=

zad.5

Wykonaj działania

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

6 3/4-(2 1/2+1 1/2)= 6 7/9-(4 7/18-1 5/6)=

zad.6

Oblicz

2/7x7/8= 1 1/2x3/4= 2 3/4x4/11= 3 1/3x1 1/5=

2 7/10x5 1/3= 5x2 1/30=

zad.7 Oblicz

(3 2/5+2 2/3)x(6 1/14-2 6/7)=

5+2/3x6= 3/8x4+3=

zad.8

Oblicz

1 1/4 liczby500= 2 1/3liczby210 3/7=

(2 1/4)do potęgi2= (4 2/7)do potęgi2=

1 5/7liczby3 1/2=

zad.9

Lektura ma 256 strony.Zosia przeczytała już 3/4książki.Ile to stron?

zad.10

Oblicz

8 1/4+4 2/3= 5 1/3-2 4/5= 9/10x3 1/3=

2 2/5:1 4/5= (2 3/10+1 3/4)x(7 5/12-2 7/9)=

3/4x2+3= 2+3x1/3=

Answer 1

Zad.1.

a) 2/3

b) 4/6

c) 6/9

d) 8/12

e) 10/15

 

Zad.2.

a) 1/2+3/4=

=2/4+3/4=

=5/4=

=1 1/4

 

b)9 1/3+5 2/11+3 2/3=

=28/3+57/11+11/3=

=308/33+171/33+121/33=

=600/33=

=18 6/33

Zad.3.

a)7 2/3+2 5/6=

=23/3+17/6=

=46/6+17/6=

=63/6=

=10 1/2

b)1 1/3+2 3/4=

=4/3+11/4=

=16/12+33/12=

=49/12=

=4 1/12

c)1 3/4+2 3/10=

=7/4+23/10=

=70/40+92/40=

=162/40=

=4 2/40=

=4 1/20

Zad.4.

a) 7 5/9-2 1/2+1 5/6-1 17/18=

=68/9-5/2+11/6-35/18=

=136/18-45/18+33/18-35/18=

=89/18=

=4 17/18

 

b) (2 1/6-1 5/12)+(2 7/8-1 5/6)=

=(13/6-17/12)+(23/8-11/6)=

=(26/12-17/12)+(138/48-88/48)=

=9/12+50/48=

=36/48+50/48=

=86/48=

=1 38/48=

=1 19/24 

Zad.5.

a) 2 1/3-4/6+1/2=

=7/3-4/6+1/2=

=14/6-4/6+3/6=

=14/6-7/6=

=7/6=

=1 1/6

 

b) 5-(3 1/2-3/4+1/8)=

=5-(7/2-3/4-1/8)=

=5-(28/8-6/8-1/8)=

=5/1-21/8=

=40/8-21/8=

=19/8=

=2 3/8

 

c) 6 3/4-(2 1/2+1 1/2)=

=27/4-(5/2+3/2)=

=27/4-8/2=

=27/4-16/4=

=11/4=

=2 3/4

 

d)6 7/9-(4 7/18-1 5/6)=

=61/9-(79/18-11/6)=

=61/9-(79/18-33/18)=

=61/9-46/18=

=122/18-46/18=

=79/18=

=4 4/18=

=4 2/9

 

Zad.6.

a) 2/7x7/8=

=2/8=

=1/4

 

b) 1 1/2x3/4=

=3/2*3/4=

=9/8=1 1/8

 

c) 2 3/4x4/11=

=11/3*4/11=

=4/3=

=1 1/3

 

d) 3 1/3x1 1/5=

=10/3*6/5=

=12/3=

=4

 

e) 2 7/10x5 1/3=

=27/10*16/3=

=72/5=

=14 2/5

 

f) 5x2 1/30=

=5/1*61/30=

=61/6=

=10 1/6

 

Zad.7.

a) (3 2/5+2 2/3)x(6 1/14-2 6/7)=

=(17/5+8/3)*(85/14-20/7)=

=(51/15+40/15)*(85/14-40/18)=

=91/15*45/14=

=819/42=

=19 1/2

 

b) 5+2/3x6=

=5+4=

=9

 

c) 3/8x4+3=

=3/2+3/1=

=3/2+6/2=

=9/2=

=4 1/2

 

Zad.8.

a) 1 1/4 liczby 500=

=5/4*500=

=625

 

b) 2 1/3 liczby 210 3/7=

=7/3*1473/7=

=1473/3=

=491

 

c) (2 1/4)^2=

=(9/4)^2=

=81/16=

=5 1/16

 

d) (4 2/7)^2=

=(30/7)^2=

=900/49=

=18 18/49

 

e) 1 5/7 liczby 3 1/2=

=12/7*7/2=

=6

 

Zad.9.

Lektura ma 256 strony.Zosia przeczytała już 3/4książki.Ile to stron?

 

256 - 100% książki

3/4 - ilość przeczytanej książki przez Zosię

 

256*3/4=

=265*0,75=

=192

 

Odp.:Zosia przeczytała 192 strony książki.

 

Zad.10.

a) 8 1/4+4 2/3=

=33/4+14/3=

=154/4=

=38 1/2

 

b) 5 1/3-2 4/5=

=16/3-14/5=

=224/15=

=14 14/15

 

c) 9/10x3 1/3=

=9/10*10/3=

=3

 

d) 2 2/5:1 4/5=

=12/5:9/5=

=12/5*5/9=

=4/3=

=1 1/3

 

e) (2 3/10+1 3/4)x(7 5/12-2 7/9)=

=(23/10+7/4)*(89/12-25/9)=

=(92/40+70/40)*(801/108-300/108)=

=162/40*501/108=

=81162/4320=

=18 3402/4320

 

f) 3/4x2+3=

=1/2

 

g) 2+3x1/3=

=2+1=

=3