Practice the questions given in the worksheet on combining like terms and unlike terms. The questions are based on grouping and combining the like terms with addition & subtraction and problems on adding or subtracting terms that involves variables by combining like and unlike terms.

**1. Find the sum of
combining like terms:**

(i) a + 2b – 3c; -3a + b +2c and 2a – 3b + c

(ii) -3x + 2y + z; x – 3y + 2z and 2x + y – 3z

(iii) 4p + 3q + 5r; -2p + 3q – 8r and p – q + r

(iv) a + b + c; 2a + 3b – 2c and 3a – 4b + c

(v) -17q – 2r + 23p; -9p + 15q + 7r and -13p + 3q – 4r

**2. Subtract from:**

(i) 3ab – 5bc + 8ca take -4ab + 2bc – 10ca

(ii) 4m(iii) x

(iv) bc – ca + ab take –ab + bc – ca

(v) -2a

Now we will practice the word problems on addition and subtraction combining like terms provided in the worksheet on combining like terms.

**3.** To the sum of
2x – 3y - 2z and 2y – x + 7z at the sum of x – 4z + 7y and z – 6y.

**8.** The sum of the
two algebraic expressions is p – 2q + 3r. If one of them is 3p – q – 2r, find
the other.

**9.** From the sum
of x + y – z and 2x – 5y + 3z, subtract the sum of 4x – y + z and x – y – 4z

**11.** If the
perimeter of a triangle is 2a + 17b + 6c and the two sides are 4a – 3b + 5c, 3a
+ 7b – 2c, find the third side.

Answers for the worksheet on combining like terms are given below to check the exact answers of the above problems.

**Answers:**

**1. **(i) 0

(ii) 0

(iii) 3p + 5q - 2r

(iv) 6a

(v) p + q + r

**2. **(i) 7ab – 7bc
+ 18ca

(iii) -2x

(iv) 2ab

(v) -3a

**● ****Terms - Worksheets**

Worksheet on Like and Unlike Terms

Worksheet on Addition of Like Terms

Worksheet on Subtraction of Like Terms

Worksheet on Adding and Subtracting Like Terms

Worksheet on Combining Like Terms

Worksheet on Addition of Unlike Terms

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