Question

va rog rezolvati nu inteleg cum se rezolva​
de abia am invatat ​

Answer 1

3.suma a 4 numere consecutive este 448.Care sunt numerele?

a+b+c+d=448

a,b,c,d= nr naturale consecutive IMPARE

scriem matematic:

a+b+c+d=448

b=a+2

c=b+2=a+4

d=c+2=b+6

a+b+c+d=a+a+2+a+4+a+6=4a+12

4a+12=448

a=(448-12)/4=109

a=109

b=111

c=113

d=115

4.

a |-----|-----|-----|-----|12|

b |-----|

135 - 12 = 123 ( diferenta de 3 segmente)

123 : 3 = 41 (b)

41 × 4 +12 = 176 (a)

Verificare: 176 - 41 = 135