Question

/ to jest kreska ułamka a np. 1 1/2 = jedna cała i jedna druga. Prosiłabym o działania :

a) 1 1/3+3/5

b) 2 5/6+1 3/8

c) 5/9+5/6

d)1 7/10+2 3/4

e) 6 3/4- 7/8

f) 6 7/9-2/3

g) 1 1/2-6/7

h) 7 3/4-5 4/5

Answer 1

a) 1 1/3+3/5 = 1 5/15 + 9/15 =  1 14/15

 

b) 2  5/6+1  3/8 = 2 40/48 + 1 18/48 = 3 58/48 = 4 10/48 = 4 5/24

 

c) 5/9+5/6 = 10/18 + 15/18 = 25/18 = 1 7/18

 

d)1  7/10+2  3/4 = 1 28/40 + 2 30/40 = 3 58/40 = 4 18/40 = 4 9/20

 

e) 6  3/4- 7/8 = 6 6/8 - 7/8 = 5 7/8

 

f) 6  7/9-2/3 = 6 7/9 - 6/9 = 6 1/9

 

g) 1  1/2-6/7 = 1 7/14 - 12/14 = 9/14

 

h) 7  3/4-5  4/5 = 7 15/20 - 5 15/20 = 2