Algebraic Expressions — Chapter Test

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Like terms have the same ___ ?

Like terms share the same variable part.

What is the coefficient of x in 7x?

The number multiplying x is 7.

Which pair are like terms?

3a and 5a share the variable a.

Simplify: 2x + 3x.

2x + 3x = 5x.

Simplify: 6a + 4a.

6a + 4a = 10a.

Simplify: 8x − 3x.

8x − 3x = 5x.

Expand: 2(x + 5).

2 × x + 2 × 5 = 2x + 10.

Expand: x(x + 3).

x × x + x × 3 = x² + 3x.

Expand: 3(2x + 1).

3 × 2x + 3 × 1 = 6x + 3.

Q10

If x = 3, what is the value of 2x + 1?

2 × 3 + 1 = 7.

Q11

The perimeter of a square of side x is 4x. If x = 5, what is the perimeter?

4 × 5 = 20.

Q12

The cost of n pens at ₹10 each is 10n. If n = 6, what is the cost?

10 × 6 = ₹60.

Q13

Simplify: 2(x + 3) + 3(x + 1).

2x + 6 + 3x + 3 = 5x + 9.

Q14

If x = 4, what is the value of x² + 2x?

16 + 8 = 24.

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