Question

1.Calculati:
a)5x(11,3-2,4x3,5)+11;
b)[13,4-0,5x(147,8-1,25x100)]x10-13,41;
c)11x(48-12x3,4)+5x[19+4x(8,3-5,4)]-20,3.

Answer 1

a)
5×(11,3-2,4×3,5)+11=
=5×(11,3-8,4)+11=
=5×2,9+11=
=14,5+11=
=25,5

b)
[13,4-0,5×(147,8-1,25×100)]×10-13,41=
=[13,4-0,5×(147,8-125)]×10-13,41=
=(13,4-0,5×22,8)×10-13,41=
=(13,4-11,4)×10-13,41=
=2×10-13,41=
=20-13,41=
=6,59

c)
11×(48-12×3,4)+5×[19+4×(8,3-5,4)]-20,3=
=11×(48-40,8)+5×(19+4×2,9)-20,3=
=11×7,2+5×(19+11,6)-20,3=
=79,2+5×30,6-20,3=
=79,2+153-20,3=
=232,2-20,3=
=211,9