Question

6. Calculează respectând regulile învătate.
a) 8 + 5 x [20 + 3 * (2 + 4 * 6) – 15] – 3 = ?
b) (150 + 12 x 8 – (14 x 2 – 40 : 4)] x 10 = ?
c) 5 + 5 x [5 + 2 x (5 + 25 * 1- 24:4)] = ?​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 8+5[20+3(2+24)-15]-3=5+5(20+3×26-15)=5(1+20+78-15)==5×84=420

b)[150+96-(28-10)]×10=(150+96-18)×10=228×10=2280

c)5+5[5+2(5+25-6)]=5+5(5+2×24)=5(1+5+48)=5×54=270

Answer 2

Răspuns:

a) 420

b) 2380

c) 270

Explicație pas cu pas:

a) 8+5×[20+3×(2+4×6)-15]-3= 8+5×[20+3×(2+24)-15]-3

=8+5×(20+3×26-15)-3

=8+5×(20+78-15)-3

=8+5×(98-15)-3

=8+5×83-3

=8+415-3

=423-3

=420

b) [150+12×8-(14×2-40:4)]×10=

=[150+96-(28-10)]×10

=(246-18)×10

=238×10

=2380

c) 5+5×[5+2×(5+25×1-24:4)]=

=5+5×[5+2×(5+25-6)]

=5+5×[5+2×(30-6)]

=5+5×(5+2×24)

=5+5×(5+48)

=5+5×53

=5+265

=270