Question

Va rog ajutatimaaa!!!!!!Uitativa la poza

Answer 1

6. A+B=15 ani
A= 3+B

B ! - - - !
A ! - - - ! - +3 - !

15-3 = 12 ani
12 ani : 2 parti egale = 6 ani (B)
A= 6+3 = 9 ani (A)

Verificare: 6+9=15 ani                                                                                                                                                                                                                             7.   Sotul+sotia=4640. Sotul|----------|1600|. Sotia|----------|1040|. 4640-1600-1040=3040-1040=2000. 2000:2=1000. 1000+1600=2600(lei primeste sotul). 1000+1040=2040(lei primeste sotia). Proba:2600+2040=4640. Raspuns:sotul primeste 2600 lei, sotia primeste 2040 lei.                                                                                                           8.    a+b=60
a=b×3
b×3+b=60
4b=60
b=60÷4
b=15
a=15×3
a=45
45+15=60                                                                                                                               9.    Presupunem ca toti sunt iepuri.
40 * 4 pic. = 160 picioare
Diferenta dintre valoarea reala si cea presupusa
160 - 100 = 60 picioare
4 - 2 = 2 dif. de picioare
60 : 2 = 30 capete gaini
30 * 2 = 60 picioare de gaini
40 - 30 = 10 capete iepuri
10 * 4 = 40 picioare iepuri
30 + 10 = 40 capete si
 60 + 40 = 100 picioare                                                                                                                   10.  cat cantaresc prunele? 2+2=4kg                                                cat cantaresc perele?  2+2=4kg                                                           cate kg de fructe a cumparat la un loc?  2+4+4=10 kg[fructe]