Question

1. Oblicz,sprowadzając ułamki do wspólnego mianownika.

a) 1/2 + 3/4 =

b) 2/5 + 1/3 =

c) 5/6 -7/15 =

d) 6 i 4/5 + 2 3/2 =

e) 6 i 3/4 + 7/8 =

f) 8 i 3/4 + 7/8 =

g) 1/2 - 3/8 =

h) 5 i 11/15 - 2/3 =

i ) 4 - 2 i 3/4 =

j) 5 - 1/2 =

k ) 9/12 - 1/3 =

l ) 1/2 - 3/8 =

m ) 2 i 5/11 - 7/11 =

n) 5 11/115 - 3 i 2/15 =

o) 3 i 4/5 - 2 i 1/2 =

p) 2 i 1/2 + 3 i 3/4 + 5 i 1/8 - 3 i 3/8 =

2. Oblicz zamieniając odpowiednio ułamki.

a) 4 i 2/5 + 0,15 =

b) 2,2 + 1/2 =

c) 9,25 - 2 i 3/4 =

d) 5 i 1/2 + 2,5 =

e) 12 i 1/4 - 6,7 =

f) 2 i 1/2 + 7,05 + 3/4 =

Dam naj. Dzięki.

Answer 1

a) 1/2 + 3/4 = 2/4 + 3/4 = 7/4 = 1 3/4

b) 2/5 + 1/3 = 6/15 + 5/15 = 11/15

c) 5/6 -7/15 = = 25/30 - 14/30 = 11/30

d) 6 i 4/5 + 2 3/2 =34/5  + 7/2 = 68/10 + 35/10 = 103/10 = 10 3/10

e) 6 i 3/4 + 7/8 =27/4 + 7/8 = 54/8 + 7/8 = 61/8 = 7 4/8 = 7 1/2

f) 8 i 3/4 + 7/8 =35/4 + 7/8 = 70/8 + 7/8 = 77/8 = 9 5/8

g) 1/2 - 3/8 = 4/8 - 3/8 = 1/8

h) 5 i 11/15 - 2/3 =86/15 - 2/3 = 86/15 - 10/15 = 76/15 = 5 1/15

i ) 4 - 2 i 3/4 = 16/4 - 11/4 = 5/4 = 1 1/4

j) 5 - 1/2 = 4 1/2

k ) 9/12 - 1/3 =9/12 - 4/12 = 5/12

l ) 1/2 - 3/8 =4/8 - 3/8 = 1/8

m ) 2 i 5/11 - 7/11 = 1 16/11 - 7/11 = 1 9/11

n) 5 11/15 - 3 i 2/15 = 2 9/15

o) 3 i 4/5 - 2 i 1/2 =19/5  - 5/2 = 38/10 - 25/10 = 13/10 = 1 3/10

p) 2 i 1/2 + 3 i 3/4 + 5 i 1/8 - 3 i 3/8 =5/2 + 15/4 + 5 1/8 - 3 3/8 = 20/8 + 30/8 +

5 1/8 - 3 3/8 = 50/8 + 5 1/8 - 3 3/8  = 5 51/8 - 3 3/8 = 2 48/8 = 2 * 6 = 12

 

2.

a) 4 i 2/5 + 0,15 = 4,4 + 0,15 = 4,55

b) 2,2 + 1/2 =2,2 + 0,5 = 2,7

c) 9,25 - 2 i 3/4 = 9,25 + 2,75 = 12

d) 5 i 1/2 + 2,5 = 5,5 + 2,5 = 8

e) 12 i 1/4 - 6,7 = 12,25 + 6,7 = 18,95

f) 2 i 1/2 + 7,05 + 3/4 =2,5 + 7,05 + 0,75 = 10,3