Números Inteiros

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Mah Santos
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Quest�es: 8 | Attempts: 25,572

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Matemática e Informática uma parceria que sempre dará certo!Vamos lá Moçada!

• 1.

A temperatura está em -7ºC e cai mais 4ºC. Para quanto foi a temperatura?

• A.

-3ºC

• B.

3ºC

• C.

11ºC

• D.

-11ºC

• E.

-10ºC

D. -11ºC
Explanation
The initial temperature is -7ºC and it decreases by 4ºC. To find the final temperature, we subtract 4 from -7, resulting in -11ºC.

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• 2.

Resolvendo a expressão: (-8) + (-4) - (-3) + (-12) obtemos:

• A.

10

• B.

-10

• C.

+24

• D.

21

• E.

-21

E. -21
Explanation
When solving the expression (-8) + (-4) - (-3) + (-12), we start by simplifying the double negative (-8) + (-4) + 3 + (-12), which gives us -8 - 4 + 3 - 12. Then, we combine like terms to get -12 - 9, which equals -21.

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• 3.

Um submarino está a 150m de profundidade. Ele sobe 100m depois mais 33 metros e depois desce 16 metros. Como podemos indicar a sua posição em relação ao nível do mar?

• A.

-17m

• B.

-13m

• C.

-33m

• D.

-21m

• E.

N.d.a

C. -33m
Explanation
The submarine starts at a depth of 150m and then rises 100m, bringing it to a depth of 50m. It then rises an additional 33m, bringing it to a depth of 17m. Finally, it descends 16m, bringing it to a depth of -33m. This negative value indicates that the submarine is now 33m above sea level.

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• 4.

Resolvendo a expressão (-8) + (-5) - (-12 + 8) + (-10)

• A.

-19

• B.

19

• C.

-13

• D.

-15

• E.

21

A. -19
Explanation
The expression can be simplified by following the order of operations (PEMDAS/BODMAS). First, we solve the parentheses: (-12 + 8) equals -4. Then, we add the negative signs before each number: (-8) + (-5) - (-4) + (-10). Combining like terms, we have -8 - 5 + 4 - 10, which equals -19.

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• 5.

Qual será o resultado das seguintes multiplicações:(-5) . (-5) e (10) . (-2) (Lembre-se: Na MULTIPLICAÇÃO dois sinais iguais resulta (+) e dois sinais opostos resulta (-)

• A.

25 e 20

• B.

-25 e -20

• C.

25 e -20

• D.

-25 e 20

• E.

N.d.a.

C. 25 e -20
Explanation
The given question asks for the result of two multiplications. In the first multiplication, (-5) multiplied by (-5), two negative signs are being multiplied, which results in a positive sign. Therefore, the result is 25. In the second multiplication, (10) multiplied by (-2), there are two signs that are opposite to each other, which results in a negative sign. Therefore, the result is -20.

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• 6.

Efetuando a divisão (+42) : (-6) obtemos:

• A.

+7

• B.

-7

• C.

+6

• D.

-6

• E.

N.d.a.

B. -7
Explanation
When dividing a positive number (+42) by a negative number (-6), the result will be a negative number. In this case, the division of 42 by 6 is 7, and since the divisor is negative, the quotient will also be negative. Therefore, the correct answer is -7.

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• 7.

Resolva: -12 + 10 + 8 - 20 - 16 + 5

• A.

-25

• B.

25

• C.

20

• D.

-30

• E.

-26

A. -25
Explanation
To solve the given expression, we can combine the positive and negative numbers together. Starting with the negative numbers, we have -12, -20, and -16. When we add them together, we get -48. Now, let's add the positive numbers: 10, 8, and 5. Adding them gives us 23. Finally, we can subtract 48 from 23, which gives us -25. Therefore, the correct answer is -25.

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• 8.

• A.

-8

• B.

-7

• C.

-5

• D.

-3

• E.

5