Răspuns:
1)2÷1/2+3÷1/3=2*2/1+3*3/1=4+9=13
2)2*0-2=-2(a)
2*1-2=1(b)
2*3-2=4(c)
-2+1+4=3
3) n=-1
n <1-√2<n+1
1-√2≈1-1,414≈-0,414⇒-1<-0,414<0⇒n=-1
4)scara=1÷250000
distanta pe harta=12cm
distanta reala=12*250000=3000000cm=30000m=30 km
4)x-1=3⇒x=3+1=4
x-1=-3⇒x=-3+1=-24+(-2)=2
Explicație pas cu pas:
