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Add and subtract monomials worksheet

Add and subtract monomials worksheet with answers.

Example 1.

Add and subtract monomials

40x + 20x - 55x = 5x

Example 2.

Add and subtract monomials

10a + 10b - 6a - 6b =
(10a - 6a) + (10b - 6b) =
4a - 4b

Example 3.

Add and subtract monomials

3y8 + 2y8 - y8 =
3y8 + 2y8 - 1y8 =
4y8

Example 4.

Add and subtract monomials

5.9x + 5.9y - 4.9x - 0.9y =
(5.9x - 4.9x) + (5.9y - 0.9y) =
5y + x

Example 5.

Add and subtract monomials

67a6 + 3a6 - 4.8a5 =
70a6 - 4.8a5

Example 6.

Add and subtract monomials

17a7 + 17a6 - 17a5

These three terms are not like terms. We can only add and subtract like terms (monomials).