Question

Calcule o valor de cada expressão numérica. (Com resolução passo a passo)a) 20 + [-15 - ( -5 - 8)]b) 15 - (13 +11) - [12 - (8-3)]c) {[15 - 23 + 10] - (30 - 42)} + (-6)d) {10 - [5 + ( -8 - 3)] - 2 + (7 - 9)} + (+5)e) (-12) : (+4) + 3 x (-5)f) {24 : [-2 x (3 x 4 - 6)] :2} + 3g) 15 : [16 : (4 - 4 x 3) - 3] - 5h) 5 - {8 : 2 - [ -5 (3 + 1) + 2] : 3} + 1

Answer 1

a)20+[-15-(-5-8)]
20+[-15-(-13)]
20+[-15+13]
20+(-2)
20-2
18

b)15-(13+11)-[12-(8-3)]
15-24-[12-(5)]
39-[12-5]
39-7
32

c)[15-23+10]-(30-42)+(-6)
[15-33]-(-12)-6
-18+12-6
-6-6
-12

d)(10-[5+(-8-3)-2+(7-9)]+(+5)
(10-5+(-11)-2-(-2)]+5
(10-5+11-2+2+5)
5-11-2+2+5
;6-2+2+5
-8+2+5
-6+5
-1

e)(-12):(+4)+3x(-5)
-3+(-15)
-3-15
-18

f)[24:[-2x(3x4-6)]:2]+3
[24:[-2x(3x-2):2]+3
[24:[-2X(-6):2]+3
[24:[-12:2]+3
[24:(-6)]+3
-4+3
-1

g)15:[16:(4-4x3)-3]-5
15:[16:(0x3)-3]-5
15:[16:(0)-3]-5
15[16:(-3)]-5
15:[(-5,33)]-5
15:-5,33)-5
-2,81-5
7,81

h)5-[8:2-[-5(3+1)+2:3]+1
5-[4-[-5(4)+2:3]+1
5:[4+20+2:3]+1
5:[24+2:3]+1
5:[26:3]+1
5:8,66+1
5:9,66
0,517
0,52