Question

1/3 + 2/3
1/2 + 1/3
2/9 + 5/8
3/11 + 7/10
5/7 +10/7
8/25 +12/50
9/36 +5/72
11/10 +7/10
1/3 -1/5
3/7 -2/5
3/4 -2/5
1/3 - 5/21
1/11 - 2/25
11/6 -1/4 + 2/3- 3/2
5/4 +4/7 - 3/14 : 5/28
va rog frumos ajutați-mă! mulțumesc mult pentru tot.​

Answer 1

Răspuns:

Explicație pas cu pas:

1/3+2/3= 3/3=1 ( l-am uitat)

a)

= 2/3

b)

= ³⁾1/2+²⁾1/3

= 3/6+2/6

= 5/6

-

c)

⁸⁾2/9+⁹⁾5/8

=16/72+45/72

=61/72

-

e)

¹⁰⁾3/11+¹¹⁾7/10

=30/110+77/110

= 107/110

-

f)

5/7+10/7

=15/7

-

g)

²⁾8/25+12/50

=16/50+12/50

= 28/50

-

h)

²⁾9/36+5/72

=18/72+5/72

= 23/72

-

i)

11/10+7/10

= 18/10

-

j)

⁵⁾1/3-³⁾1/5

=5/15-3/15

= 2/15

-

k)

⁵⁾3/7-⁷⁾2/5

=15/35-14/35

=1/35

-

l)

⁵⁾3/4-⁴⁾2/5

=15/20-8/20

= 7/20

-

m)

⁷⁾1/3-5/21

=7/21-5/21

=2/21

-

n)

²⁵⁾1/11-¹¹⁾2/25

=25/275-22/275

= 3/275

-

o)

²⁾11/6-³⁾1/4+⁴⁾2/3-⁶⁾3/2

=22/12-2/12+8/12-18/12

= 20/12+8/12-18/12

= 20/12

-

p)

5/4+4/7-3/14:5/28

= 5/4+4/7-3/14*28/5

= ³⁵⁾5/4+²⁰⁾4/7-²⁸⁾6/5

=175/140+80/140-168/140

= 255/140-168/140

= 87/140