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^{2} – 3m + 2 take 5m^{2} + 6m – 7Now 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.
4. Subtract 3m – 7m^{3} + 5m^{2} from the sum of 2 + 8m^{2} – m^{3} and 2m^{3} – 3m^{2} + m – 2.8. 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
10. By how much does 2z^{3} – 4z^{2} + z – 1 exceeded z^{3} – 2z^{2} + z + 1.11. 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.
12. The two sides of a rectangle are 2p^{3} – 3q^{3} + 2r^{3} and 5p^{3} + 2q^{3} – 2r^{3}. Find its perimeter.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
(ii) 9m^{2} – 9m + 9● 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
Math Home Work Sheets
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