CBSE Class 7 Maths Arithmetic Expressions (Class 7 NCERT New) Quiz 9

1. When removing brackets preceded by a negative sign, what happens to the signs of the terms inside the brackets?

A The signs of the terms inside the brackets change. B The signs of the terms inside the brackets stay the same. C Only the first term changes sign. D The negative sign is ignored.

2. If Irfan pays ₹100 for a biscuit packet costing ₹15 and a toor dal packet costing ₹56, what is the change he gets in rupees?

A ₹29 B ₹44 C ₹85 D ₹41

3. Which of the following correctly shows how to remove brackets in the expression 100 - (15 + 56)?

A 100 - 15 - 56 B 100 + 15 + 56 C 100 - 15 + 56 D 100 + 15 - 56

4. Why is it simpler to first subtract 40 from 200 and then subtract 3, rather than evaluating the bracket first in 200 - (40 + 3)?

A It breaks the calculation into easier steps. B It gives a different answer. C It is required by the order of operations. D It is the only way to solve the expression.

5. What is the result of evaluating the expression 500 – (250 – 100)?

A 350 B 250 C 500 D 150

6. When brackets are preceded by a negative sign, what happens to the signs of the terms inside the brackets when the brackets are removed?

A The signs of the terms inside the brackets change. B The signs of the terms inside the brackets stay the same. C Only positive terms change their signs. D Only negative terms change their signs.

7. Hira has 28 coins in one bag and 35 coins in another. She gifts her friend 10 coins from the second bag. Which expression represents the number of coins left with Hira?

A 28 + (35 – 10) B 28 + 35 + 10 C 28 – (35 + 10) D 28 – 35 – 10

8. Which of the following is equivalent to 28 + (35 – 10)?

A 28 + 35 – 10 B 28 + 35 + 10 C 28 – 35 + 10 D 28 – 35 – 10

9. If the brackets in an expression are NOT preceded by a negative sign, what happens to the signs of the terms inside the brackets when the brackets are removed?

A The signs do not change. B The signs change to their opposites. C Only positive terms change their signs. D Only negative terms change their signs.

10. Why is it important to understand when to change the sign and when not to, rather than simply remembering rules?

A It helps you figure out the meanings of expressions by thinking about them. B It makes calculations faster. C It avoids mistakes in multiplication. D It is required for advanced mathematics only.