1. Find the value of 5 + 2.
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Correct answer is option - 3
Explanation:
By the method of general addition, 5 + 2 = 7.
So the answer is 7.
2. What is the value of 5 + 3 + 4?
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Correct answer is option - 1
Explanation: a
By the general method of addition, we start from the left and get 5 + 3 = 8 and then 8 + 4 = 12.
So the answer is 12.
3. The value of 6 – 5 is?
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Correct answer is option - 1
Explanation:
By the general method of subtraction, we start from the left and get 6 – 5 = 1.
So the answer is 1.
4. What is the value of 4 – 7?
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Correct answer is option - 2
Explanation:
In the given integers, ‘4’ is a positive number and ‘7’ is a negative number. Since there is at least one negative sign we subtract.
But after subtracting, the final answer gets the sign of the bigger number.
This gives: 4 – 7 = -3.
5. What is the value of -5 – 10?
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Correct answer is option - 4
Explanation:
Here in the question, since both the numbers have negative signs, hence we add the numbers but the final answer gets a negative sign as well!
This implies: -5 – 10 = -15.
6. What is the value of -7 + 4 – 2?
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Correct answer is option - 5
Explanation:
Here it’s safe to go step-by-step by starting from the left side.
So we get: -7 + 4 = -3. Now, -3 – 2 = -5.
So the final answer is -5.
7. What is the value of 2x + 4x?
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Correct answer is option - 3
Explanation:
Since both the terms, ‘2x’ and ‘4x’ contain ‘x’ as the variable hence they are like terms and can be added directly like general integers.
So 2x + 4x = (2 + 4) x = 6x.
8. Evaluate: 6x + 7x + 3x
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Correct answer is option - 4
Explanation:
Since here all the terms contain ‘x’ as the variable, hence they are like terms and can be added directly.
This gives: 6x + 7x + 3x = (6 + 7 + 3) x = 16x.