Question

1.Efectuati:
a)16+16×2=
b)9+3×457=
c)2×(1400-546)=
d)6×[3+3×(4+4×225)]=
e)8×{2+10×[542+2×(2+2×542)]}=
f)(12×25-5×13)+1000:8-100÷4=
2.daca a=18 si b+c=57 atunci calculați valoarea expresiilor:
a)a+b+c=
b)a+5×b+5×c=
c)3×a+2×b+2×c=
d)a×b+a×c+7×b+7×c=

VA ROG CAT MAI REPEDE POSIBIL DAU CORONITA LA RASPUNSUL CORECT.Sa îmi dati cu tot cu calcul raspunsurile!

Answer 1

1.
a)16+16×2=16+ 32= 48
b)9+3×457=9+ 1371=1380
c)2×(1400-546)=2× 854= 1708
d)6×[3+3×(4+4×225)]=6×[3+3×(4+ 900)]=6×(3+3×904)=6×(3+ 2712)=6×2715= 16290
e)8×{2+10×[542+2×(2+2×542)]}=8×{2+10×[542+2×(2+1084)]}=8×[2+10×(542+2×1086)]=
8×[2+10×(542+ 2172)]=
8×(2+10× 2714)=8×(2+27140)=8×27142=217136
f)(12×25-5×13)+1000:8-100:4=(300- 65)+125-25=265+125-25=265+100=365

2.
a)a+b+c=18+57= 75
b)a+5×b+5×c=18+5×57×5=18+ 285×5=18+ 1425= 1443