(-3).(+4)=-12
(-1).(-7)=7
(+9).(-2)=-18
(-10):(-5)=2
(-3).(-2).(+5)=30
(-5).(+4):(-10)=2
-(+3-5)+(-2+10)-(-3)= 2+8+3=13
-6+9-(+4-3)+(-1+6)=3-1+5=7
18=2×3²
12=2²×3
32=2⁵
c.m.m.m.c.=2⁵×3²=32×9=288
c.m.m.d.c. =2
triunghiul abc unghiul A=40 unghiul B=80
unghiul C=180⁰-(40⁰+80⁰)=60⁰
AB=5cm, BC=6cm, AC=10 P=5+6+10=21
(a,b,c) d.p (2,3,6) a+b+c=33
a/2=b/3=c/6 b=3a/2 c=6a/2=3a
a+3a/2+3a=33
2a+3a+6a=66
11a=66
a=6
b=3×6/2=9
c=3×6=18
5 caiete.......................150lei
8
caiete.........................xlei.
x=8×150/5=8×30=240 lei