Question

Calculati, Dupa Modelul Prezentat : 12x99=12x(100-1)=12x100-12x1=1200-12=1188

A.35x99 B.27x101 C.15x102 D.31x98 E.4x999 f.5x1004

Pls Repede! ​

Answer 1

Explicație pas cu pas:

a. 35x99=35x(100-1)=35x100-35x1=3500-35 =3465

b.

27x101=27x(100+1)=27x100+27x1=2700+27=2727

c.

15x102=15x(100+2)=15x100+15x2=1500+30=1530

d.

31x98=31x(100-2)=31x100-31x2=3100-62 =3038

e.

4x999=4x(1000-1)=4x1000-4x1=4000-4 =3996

f.

5x1004=5x(1000+4)=5x1000+5x4 =5000+20=5020