Practice the questions given in the worksheet on subtraction of like terms. The questions are based on arranging all the groups of like terms and then they are subtracted.
1. Fill in the blanks:
(i) 7 – 4 = ____ and 7xy – 4xy = ____
(ii) 15 – 15 = ____ and 15ab – 15ab = ____
(iii) 5 – 13 = ____ and 5mn – 13mn = ____
(iv) 39 – 19 = ____ and 39xyz – 19xyz = ____
(v) 12 – 7 = ____ and 12abc – 7acb = ____
(vi) 13 – 1 =____ and 13amz – amz =____
2. Subtract arranging
the like terms:
(i) 2a – 7b from 8a – 11b + 7(ii) –x3 + 3x2y + 2z3 from 9x3 – 5x2y – 4z3
3. Subtract the first term from the second term:
(i) 8m, 10m
(ii) 4xy, 6yx
(iii) 5mn, 7mn
(iv) 15ab, 30ab(v) 17ax2, 9ax2
(vi) 23pq, 18pq
4. The sum of two expressions is a – b + 4c if one of the term is 2a – 7b – c, find the other.
5. What should be subtracted from -11p + 3q – 5r to obtain 15p – 17q + 7r.6. How much is a3 + b3 + c3 less than -2a3 + 5b3 – 9c3?
Answers for the worksheet on subtraction of like terms are given below to check the exact answers of the above questions.
1. (i) 3, 3xy
(ii) 0, 0
(iii) -8, -8mn
(iv) 20, 20xyz
(v) 5, 5abc
(vi) 12, 12amz
2. (i) 6a - 4b + 7(ii) 10x3 – 2x2y – 6z3
3. (i) 2m
(iv) 15ab(v) -8ax2
4. -a + 6b + 5c
5. -26p + 20q – 12r6. -3a3 + 4b3 – 10c3
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