Răspuns :

LucyStefiid

3) a+a+2+a+4+a+6+a+8=385

5a=385-20

5a=65

a=65:5

a=13

a+2=15

a+4=17

a+6=19

a+8=21

4)a+a+2+a+4+a+6=1220

4a=1220-12

4a=1208

a=1208:4

a=302

Alinachirchiboiid

3)

a+b+c+d+e=385

a+2=b

b+2=c

c+2=d

d+2=e

a,b,c,d,e=?

REZOLVARE

a. /______/. }

b. /______/2/. }

c. /______/2/2/. } 385

d. /______/2/2/2/. }

e. /______/2/2/2/2/. }

385-2×10=375. (a×5)

375:5=75 (a)

75+2=77 (b)

77+2=79 (c)

79+2=81 (d)

81+2=83 (e)

4)

a+b+c+d=1220

a+2=b

b+2=c

c+2=d

a,b,c,d+?

REZOLVARE

a. /_______/

b. /_______/2/

c. /_______/2/2/. } 1220

d./_______/2/2/2/

1220-2x6=1208 (a×4)

1208:4=302 (a)

302+2=304 (b)

304+2=306.(c)

306+2=308. (d)

SPER CĂ TE-AM AJUTAT!

CORONIȚA?