1º Eso Decimales Y Fracciones
Ejercicios y problemas de números decimales y fracciones
- 1.
Calcula
- A.
181,347
- B.
182,341
- C.
182,348
- D.
Ninguna de las anteriores es correcta
Correct Answer
C. 182,348Explanation
The given options are numbers, and the task is to select the correct one. Among the given options, the number 182,348 is the only one that is higher than the number 181,347. Therefore, the correct answer is 182,348.Rate this question:
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- 2.
Calcula:
- A.
Ninguna de las anteriores es correcta
- B.
58,91
- C.
58,93
- D.
58,92
Correct Answer
D. 58,92Explanation
The given options are 58.91, 58.93, and 58.92. The correct answer is 58.92. This is the only option that matches the given number exactly.Rate this question:
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- 3.
Calcula
- A.
91
- B.
91,05
- C.
90,31
- D.
Ninguna de las anteriores es correcta
Correct Answer
A. 91 -
- 4.
Calcula
- A.
7,3
- B.
7,9
- C.
7,5
- D.
9
Correct Answer
C. 7,5 -
- 5.
Calcula
- A.
0,25
- B.
0,35
- C.
0,75
- D.
3
Correct Answer
A. 0,25 -
- 6.
Calcula
- A.
5,23
- B.
5,33
- C.
5,55
- D.
Ninguna de las anteriores es correcta
Correct Answer
A. 5,23Explanation
The correct answer is 5,23 because it is the only option that is a valid number. The other options, 5,33 and 5,55, are not correct because they contain an extra digit after the decimal point, which makes them invalid numbers. The option "Ninguna de las anteriores es correcta" means "None of the above is correct" and does not provide a valid answer. Therefore, 5,23 is the only correct option.Rate this question:
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- 7.
El kilo de merluza está a 11,20 €. Si una merluza pesa 1,450 €, ¿cuánto costará?
- A.
15,3 €
- B.
16, 20 €
- C.
16,24 €
- D.
10, 55 €
Correct Answer
C. 16,24 €Explanation
The cost of 1 kilo of hake is 11.20 euros. If a hake weighs 1.450 kilos, the cost can be calculated by multiplying the weight by the cost per kilo. Therefore, the cost of the hake would be 1.450 x 11.20 = 16.24 euros.Rate this question:
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- 8.
¿Cuántos frascos de perfume de 20 mililítros cada uno pueden llenarse con 2,5 litros de dicho perfume?
- A.
47 frascos
- B.
125 frascos
- C.
75 frascos
- D.
325 frascos
Correct Answer
B. 125 frascosExplanation
To find the number of 20 milliliter perfume bottles that can be filled with 2.5 liters of perfume, we need to convert liters to milliliters. Since there are 1000 milliliters in 1 liter, 2.5 liters is equal to 2500 milliliters. Now, we divide 2500 milliliters by 20 milliliters (the capacity of each bottle) to find the number of bottles that can be filled. 2500/20 = 125. Therefore, 125 bottles can be filled with 2.5 liters of perfume.Rate this question:
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- 9.
En una clase de 36 alumnos, 1/3 han elegido como optativa el idioma francés y 1/6 el alemán. ¿Cuántos alumnos estudian idiomas?
- A.
18 alumnos
- B.
12 alumnos
- C.
6 alumnos
- D.
Toda la clase estudia algún idioma
Correct Answer
A. 18 alumnosExplanation
In a class of 36 students, 1/3 of them have chosen French as an elective and 1/6 have chosen German. To find out how many students study languages, we need to add the fractions together. 1/3 + 1/6 = 2/6 + 1/6 = 3/6 = 1/2. Therefore, half of the class, which is 18 students, study languages.Rate this question:
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- 10.
Una persona gasta en alimentación 1/3 de lo que gana; en ropa 1/4 de lo que gana y en otros gastos emplea 1/6 de su salario. Ahorra 300 € al mes. ¿Cuánto gana cada mes?
- A.
1200 €
- B.
1000 €
- C.
1500 €
- D.
Ninguna de las anteriores es correcta
Correct Answer
A. 1200 €Explanation
The person earns 1200 euros per month. This can be calculated by adding up the amounts spent on food, clothing, other expenses, and savings. Since the person spends 1/3 of their salary on food, 1/4 on clothing, and 1/6 on other expenses, the total amount spent on these three categories is 1/3 + 1/4 + 1/6 = 13/12 of their salary. This means that the person saves 1 - 13/12 = 1/12 of their salary. Since the person saves 300 euros per month, their salary is 300 * 12 = 3600 euros per year. Dividing this by 12 gives a monthly salary of 3600 / 12 = 300 euros. Therefore, the person earns 1200 euros per month.Rate this question:
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- 11.
Resuelve
- A.
1/3
- B.
5/3
- C.
3
- D.
Ninguna de las anteriores es correcta
Correct Answer
A. 1/3Explanation
The correct answer is 1/3. This is because when we divide 1 by 3, we get a result of 1/3. None of the other options listed in the question are correct as they do not match the result of the division 1/3.Rate this question:
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- 12.
Resuelve
- A.
13/25
- B.
-25/13
- C.
25/13
- D.
20/13
Correct Answer
B. -25/13 -
- 13.
Resuelve
- A.
-254/35
- B.
234/35
- C.
254/35
- D.
Ninguna de las anteriores es correcta
Correct Answer
A. -254/35Explanation
The given answer is -254/35. This can be obtained by subtracting 234/35 from 254/35. When we subtract the numerators, we get -20, and the denominator remains the same. Therefore, the correct answer is -254/35.Rate this question:
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Jul 22, 2024Quiz Edited by
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Apr 13, 2020Quiz Created by
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