Question

Exercitiile : 8;9; si 10
99 de puncte
Repedeee

Answer 1

8.
1*2/5+15/7*14/25=
=7/5+6/5
=13/5
9.a
4.15+[22.5:1.5·0.4-(33.6:3·2-4.2²)]=
=4.15+[6-(22.4-17.64)]
=4.15+6-4.76
=5.39
9.b.
40m²+0.05hm²-300cm²=
=4000dm²+50000dm²-3dm²
=53997dm²
9.c.
8105m²=81.05ari=0.8105ha
10.
7+5+8+7+10+9+x = 8 x 7
46+x = 56
x = 56 - 46
x = 10