Question

Urgente¡¡¡


a)-2 (4-9)+9=
_________
-11 + 1


b) [8+2+1] + 2 [5-3+1] 2=
_____ __
5 2



c) 4 (2x5) + 5 =
______
3 - 11



d) 2[6(12-8)-7 (9+5)]+4




Ayúdenme por favor expliquen cada paso

Answer 1

a)-2 (4-9)+9=
(-2x4)-(-2x9)+9
-8-(-18)+9
-8+18+9
-8+27
19

b) [8+2+1] + 2 [5-3+1] 2=
11+2+2x3x2
11+2+12
15

c) 4 (2x5) + 5 =
(4x2)x(4x5)+5
8x20+5
40+5
45

d) 2[6(12-8)-7 (9+5)]+4
   2((6x12)-(6x8)-(7x9)+(7x5))+4
    2(72-48-63+35)+4
     2(24-63+35)+4
      2(-39+35)+4
       2(-4)+4
        -8+4
           -4

espero q te ayude