Question

Exercițiile 7,8,9 de la varianta 5. Repede!!!

Answer 1

7)
3,2²:1,6²+2,7•(2-3•0,5)=
=(3,2:1,6)²+2,7(2-1,5)=
=2²+2,7•1,5=
=4+1,35=
=5,35
8)
Un pătrat are 4 axe de simetrie.
9)
1,5 dam=15 m
A=20×15
A=300 m²
300:2=150 m² cartofi
300-150=m² rest
150×1/3=50 m² roșii
300-150-40=100 m² rest
100×1/4=25 m² ardei
100-25=75 m² flori