Question

(-2-4-6-...-48):(-100)=?
(-3-6-9-...-450):(+453)=?

Answer 1

Răspuns:

(-2-4-6-...-48):(-100)=[(-50)·48:2:2]:(-100)=(-600):(-100)=6

(-3-6-9-...-450):(+453)=[(-453)·450:3:2]:453=(-33975):453=-75

Explicație pas cu pas:

Answer 2

Răspuns:

Explicație pas cu pas:

a)(-2-4-6-...-48)=-2(1+2+3+.....+24)=-2×24×25/2==24×25

E=-24×25×(-1/100)=6

b)(-3-6-9-...-450):(+453)=-3(1+2+3+........+150)×1/453=

=-3×150×151/2×1/151×3=-75