Question

CALCULE O VALOR DAS EXPRESSOES:

A) (12 + 2 x 5) - 8 =

B) 25 - (15 + 6 : 3) =

C) 25 + [7 + (8 - 4 : 2 )]

D) 60 - [8 + ( 10 - 2) : 2]

E) 80 - [22 + (5 X 2 - 1) + 6 ]

F) 14 : 2 + [13 - (4 X 2 + 1)]

Answer 1

A)
= (12 + 2 x 5) - 8
= (12 + 10) - 8
= 22 - 8
= 14
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B)
= 25 - (15 + 6 : 3)
= 25 - (15 + 2)
= 25 - (17)
= 25 - 17
= 8
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C)
= 25 + [7 + (8 - 4 : 2 )]
= 25 + [ 7 + (8 - 2)]
= 25 + [ 7 + 6]
= 25 + 13
= 38
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D)
= 60 - [8 + ( 10 - 2) : 2]
= 60 - [ 8 + 8: 2]
= 60 - [ 8 + 4]
= 60 - [ 12]
= 60 - 12
= 48
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E)
= 80 - [22 + (5 X 2 - 1) + 6 ]
= 80 - [22 + (10 - 1) + 6]
= 80 - [22 + 9 + 6]
= 80 - [ 31 + 6]
= 80 - 37
= 43

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F)
= 14 : 2 + [13 - (4 X 2 + 1)]
= 7 + [ 13 - (8 + 1)]
= 7 + [ 13 - (9)]
= 7 + [ 13 - 9]
= 7 + 4
= 11
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Answer 2

Resposta:

como se faz está conta de 22,5 kg × 12