Question

Calculează respectând regulile învățate
a) 8+5×[20+3×(2+4×6)-15]-3=?
b) [150+12×8-(14×2-40:4)]×10=?

c) 5+5×[5+2×(5+25×1-24: 4)]=?
Va rog ajutați ma cât mai repede

Answer 1

Răspuns

a)

8+5·[20+3·(2+4·6)-15]-3=

8 + 5·(20 + 3·26 - 15) - 3=

8 + 5·(20 + 78 - 15) - 3=

8 + 5·83 - 3 =

8 + 415 - 3 =

= 420

b)

[150 + 12·8- (14·2 - 40:4)]·10

[150 + 96 - (28-10)]·10 =

(246 - 18)·10 =

228·10 =

= 2280

c) 5 + 5·[5+2·(5+25·1-24: 4)]=

5 + 5·[5+2·(5+25-24: 4)]=

5 + 5·[5+2·(5+25-6)]=

5 + 5·[5+2·(5+19)]=

5 + 5·(5+2·24)=

5 + 5·(5+48)=

5 + 5·53=

5 + 265

= 270

Answer 2

a) 8+5×[20+3×(2+4×6)-15]-3= 8+5x[20+3x(2+24)-15]-3 = 8+5x(20+3x26-15)-3 = 8+5x(20+78-15)-3 = 8+5x(98-15)-3 = 8+5x83-3 = 8+415-3 = 423-3 = 420

b) [150+12×8-(14×2-40:4)]×10 = [150+96-(28-10)]x10 = (246-18)x10 = 228x10 = 2280

5+5×[5+2×(5+25×1-24: 4)] = 5+5x[5+2x(5+25-6)] = 5+5x[5+2x(30-6)] = 5+5x(5+2x24) = 5+5x(5+48) = 5+5x53 = 5+265 = 270