(12x8 y 5 + 6x7 y 6 – 9x6 y 9 ) ÷ (3x5 y 2 ), me ajudem pfvr

26)
a)40/8.5
5.5
25

b)40.5/5
200/5
40

c)14-12/3
14-4
10

d)27-5.4+16/2
27-20+8
27+28
55

e)24/2+42/6-18
12+7-18
19-18
1

f)9.7-50+40/10
63-50+4
13+4
17

g)(12/3+5)3
(4+5)3
9.3
27

h)(48/6+7)/3
(8+7)/3
15/3
5

i)40/(17-7)
40/10
4

j)9+9-1
18-1
17

l)9.2+16/4
18+4
22

m)(6+21)/9-3
27/6
4,5

n)40/(16/(15-11))
40/(16/4)
40/4
10

o)((12+18)/5+8)/7
(30/5+8)/7
(6+8)/7
15/7
2,5

p)10-((16+4)/5+1
10-(20/5+1)
10-(4+1)
10-5
5

q)(12/4+45)/8
(3+45)8
48/8
6

r)(2.9+20/4)-1
(18+5)-1
23-1
22

s)3+10/(8/(15-11))
3+10/(8/4)
3+10/2
3+5
8

2)
a)1683/3
1+6+8+3=18
18/3=6,3, portanto, Não.

b)1795/5
Se termina em 5, Sim.

c)2052/9
2052/9=228
Sim.

d)1318/7
1318/7=188,28
Não.

e)1994/4
1994/4=498,5
Não

f)3671/11
333,7272...
Não.

3)
a)
10:10,20,30,
15:15,30,
30

b)
10:10,20,30,
30:30,
 30
 
c)
8:8,16,24,32,40,48,56,64,72,
9:9,18,27,36,45,54,63,72,
72

d)
14:14,28,42,56,70,84,
21:21,42,63,84,
84

e)
25:25,50,75,100,
20:20,40,60,80,100
100
 
f)
12:12,24,36,48,60
20:20,40,60
60

g)
18:18,36,54,72
24:24,48,72
72

h)
8:8,16,24,32,40,48,56,64,72,80,88,
11:11,22,33,44,55,66,77,88,
88

i)
16:16,32,48,64,80,96,112
28:28,56,84,112
112​