Question

Help !!!!

Calcule as expressoes

a) 70-[12+(5x2-1)+6] =

b) 8:2+[15-(4x2+1)] =

c) 9+[4+2x(6-4)+(2+5)]-8 =

d) 50+{10-2x[(6+4:2)-(10-3)]}

Answer 1

a) 70-[12+(5x2-1)+6] =
70 - [12 + (10 - 1) + 6] =
70 - [12 + 9 + 6] =
70 - 26 =
44

b) 8:2+[15-(4x2+1)] =
8 : 2 + [15 - (8 + 1)] =
8 : 2 + [15 - 9] =
8 : 2 + 6 =
4 + 6 =
10

c) 9+[4+2 x (6-4)+(2+5)]-8 =
9 + [4 + 2 x 2 + 7] - 8 =
9 + [4 + 4 + 7] - 8 =
9 +15 - 8=
24 - 8 =
16

d) 50+{10-2 x [(6+4:2)-(10-3)]} =
50 + {10 - 2 x [(6 + 2) - 7]} =
50 + {10 - 2 x [8 - 7]} =
50 + {10 - 2 x 1} =
50 + {10 - 2} =
50 + 8 =
58

Answer 2

Letra A) 70[12+(9+6)
70-27
43

B)8÷2+[15-9]
8÷[2+6]
8÷8
1

C) 9+[4+2x2+10-8]
9+[8+2]
9+10
19

E) 50+{10-2x[(6+2)-(8)]}
50+{10-2x8-8}
50+{10-16-8}
50+(-14)
36