Question

exercițiile 22 si 23

Answer 1

22
a= un numar
a+84=al numar
(a+a+84)=2a+84=suma
a+84-a=84=diferenta
(2a+84):84= 4 si rest 16
2a+84= 84×4+16
2a=336+16-84
2a=268
a=268:2=134
b=134+84=218


23.
a)
a: 11=c si restul r    c=r
a=11r+r=12r                          
r=(1,2,3,4,5,6,7,8,9,10)
a={12,24,36,48,60,72,84,96,108,120}

b)
a: 13=c si restul r    r=2c
a=13c+2c=15c                          
c=(1,2,3,4,5,6,7,8,9,10,11,12)
a={15,30,45,60,75,90,105,120,135,150,165,180}

c)
a:9=4  si rest ={1,2,3,4,5,6,7,8}
a={36,37,38,39,40,41,42,43,44}
36+37+39+40+41+42+43+44=(36+44)/2 × 9 =360