ajutatima va rog mult la acest exercitiu!!​

Răspuns:

72+a=99

a=99-72

a =27

v: 72+27=99

89-b=64

b=89-64

b=25

v: 89-25=64

c+26=68

c=68-26

c=42

v: 42+26=68

d-23=36

d=36+23

d=59

v: 59-23=36

m+23=47

m=47-23

m=24

v: 24+23=47

75-n=31

n=75-31

n=44

v: 75-44=31

86-o=32

o=86-32

o=54

v: 86-54=32

p-34=34

p=34+34

p=68

v: 68-34=34

11-v=93

este greșit poate v-11=93

x+22=47

x=47-22

x=25

v: 25+22=47

59-y=41

y=59-41

y=18

v: 59-18=41

z-80=20

z=80+20

z=100

v: 100-80=20

Explicație pas cu pas:

a)

72+a=99

a=99-72

a=27

v:72+27=99✔

b)

89-b=64

b=89-64

b=25

v:89-25=64✔

c)

c+26=68

c=68-26

c=42

v:42+26=68✔

d)

d-23=36

d=36+23

d=59

v:59-23=36✔

e)

m+23=47

m=47-23

m=24

v:24+23=47✔

f)

75-n=31

n=75-31

n=44

v:75-44=31✔

g)

86-o=32

o=86-32

o=54

v:86-54=32✔

h)

p-34=34

p=34+34

p=68

v:68-34=34✔

i)

11-v=93

v=11-93

v=-82

v:11-(-82)=93✔

j)

x+22=47

x=47-22

x=25

v:25+22=47✔

k)

59-y=41

y=59-41

y=18

v:59-18=41✔

l)

z-80=20

z=20+80

z=100

v:100-80=20✔