Question

Aflati numerele care:
a) au diferenta 70,catul 5 si restul 2.
b)au diferenta 129,catul 7 si restul 3.
E urgent! Am nevoie de un raspuns corect! Va rog! Multumesc!

Answer 1

a) a-b=70
a:b=5r2
a=5b+2
5b+2-b=70
4b=68
b=68:4
b=17
a-17=70
a=87

b) a-b=129
a:b=7r3
a=7b+3
7b+3-b=129
6b=126
b=126:6
b=21
a=129+21
b=150

Answer 2

a)
a-b=70
a:b=5 (rest 2)
a=b+70
a=bx5+2
a |----|----|----|----|----|+2
b |----|
70-2=68 (4 segmente egale)
68:4=17 (b)
17x5+2=85+2= 87 (a)
V: 87-17=70
    87:17=5 (rest 2)

b)
a-b=129
a:b=7 (rest 3)
a=b+129
a=bx7+3
a |----|----|----|----|----|----|----|+3
b |----|
129-3=126 (6 segmente egale)
126:6=21 (b)
21x7+3=147+3=150 (a)
V: 150-21=129
     150:21=7 (rest 3)