Question

3. Efectuați utilizând factorul comun:
a 14. 12-14.7-5. 13:
b 7.49 +7.31-7.50;
c32.25 +32 . 11-36-30;
d 99. 11 + 13.11-112;
e 177.36-177. 31-77.5;
f32 + 32 . 15 + 32.84.​

Answer 1

Răspuns:

a). =14(12-7)-5x13=14x5-5x13=5(14-13)=5x1=5

b). = 7(49+31-50)=7x30=210

c). =32(25+11)-36x30=32x36-36x30=36(32-30)=36x2=72

d). 11(99+13)-112=

=11x112-112=112(11-1)=112x10=1120

e).= 177(36-31)-77x5=177x5-77x5=5(177-77)=5x100=500

f). =32(1+15+84)=32x100=3200

Explicație pas cu pas: