Question

a) (-12):(+4)+3×(-5)

B) -15:[16:(4-4×3)-3]-5

C) {24:[-2×(3×4-6)]:2}+3

D) 5-{8:2-[-5 (3+1)+2]:3}+

Answer 1

a) (-12):4+3x (-5)
=-3+15
=12

b) -15:[16:(4-4x3)-3]-5
= -15:[16:(4-12)-3]-5
= -15:[16:-8-3]-5
= -15:[16:-11]-5
= -15:-1,45-5
= -15:-6,45
= -2,32

c) {24:[-2x(3x4x-6)]:2}+3
= {24:[-2x (12-6)]:2]+3
= {24:[-2x6]:2}+3
={24:[-12:2}+3
=24:-6+3
=24:-3
=-8

d) 5-{8:2-[-5 (3+1)+2]:3}
= 5-{4-[-5+4+2]:3}
= 5-{4-[-5+6]:3}
= 5-{4-1:3}
= 5-{3:3}
= 5-1
= 4