Question 1 :
Add (2x + 1) and (x + 2).
Question 2 :
Add (3y + 5) and (2y - 3).
Question 3 :
Add (2z - 5) and (z + 1).
Question 4 :
Add (3a - 1) and (2a - 5).
Question 5 :
Add (5.5y - 3) and (5 - 2.5y).
Question 6 :
Add (y - 1) and (6 - 3y).
Question 7 :
Add (k - 6.5) and (2k + 0.5).
Question 8 :
Add (2a + b) and (a + 3b).
Question 9 :
Add (x + 3y) and (3x - 5y).
Question 10 :
Add (3a2 + 1) and (2 - a2).
Question 11 :
Add (6x2 + 2y) and (3x2 - 7y).
Question 12 :
Add (3p2 - 5p) and (p2 - 2p).
Question 13 :
Add (4ab - 1) and (3a - 2ab).
Question 14 :
Add (3y2z - 2) and (5 - 2y2z).
Question 15 :
Add (3a - b), (4b + c) and (2c - 3a).
Question 16 :
Add (3x2 + xy2), (5x2 - 2x2y) and (5xy2 + 7x2y).
1. Answer :
= (2x + 1) + (x + 2)
= 2x + 1 + x + 2
Group the like terms and combine them.
= (2x + x) + (1 + 2)
= 3x + 3
2. Answer :
= (3y + 5) + (2y - 3)
= 3y + 5 + 2y - 3
Group the like terms and combine them.
= (3y + 2y) + (5 - 3)
= 5y + 2
3. Answer :
= (2z - 5) + (z + 1)
= 2z - 5 + z + 1
Group the like terms and combine them.
= (2z + z) + (-5 + 1)
= 3z + (-4)
= 3z - 4
4. Answer :
= (3a - 1) + (2a - 5)
= 3a - 1 + 2a - 5
Group the like terms and combine them.
= (3a + 2a) + (-1 - 5)
= 5a + (-6)
= 5a - 6
5. Answer :
= (5.5y - 3) + (5 - 2.5y)
= 5.5y - 3 + 5 - 2.5y
Group the like terms and combine them.
= (5.5y - 2.5y) + (-3 + 5)
= 3y + 2
6. Answer :
= (y - 1) + (6 - 3y)
= y - 1 + 6 - 3y
Group the like terms and combine them.
= (y - 3y) + (-1 + 6)
= -2y + 5
7. Answer :
= (k - 6.5) + (2k + 0.5)
= k - 6.5 + 2k + 0.5
Group the like terms and combine them.
= (k + 2k) + (-6.5 + 0.5)
= 3k + (-6)
= 3k - 6
8. Answer :
= (2a + b) + (a + 3b)
= 2a + b + a + 3b
Group the like terms and combine them.
= (2a + a) + (b + 3b)
= 3a + 3b
9. Answer :
= (x + 3y) + (3x - 5y)
= x + 3y + 3x - 5y
Group the like terms and combine them.
= (x + 3x) + (3y - 5y)
= 4x + (-2y)
= 4x - 2y
10. Answer :
= (3a2 + 1) + (2 - a2)
= 3a2 + 1 + 2 - a2
Group the like terms and combine them.
= (3a2 - a2) + (1 + 2)
= 2a2 + 3
11. Answer :
= (6x2 + 2y) + (3x2 - 7y)
= 6x2 + 2y + 3x2 - 7y
Group the like terms and combine them.
= (6x2 + 3x2) + (2y - 7y)
= 9x2 + (-5y)
= 9x2 - 5y
12. Answer :
= (3p2 - 5p) + (p2 - 2p)
= 3p2 - 5p + p2 - 2p
Group the like terms and combine them.
= (3p2 + p2) + (-5p - 2p)
= 4p2 + (-7p)
= 4p2 - 7p
13. Answer :
= (4ab - 1) + (3a - 2ab)
= 4ab - 1 + 3a - 2ab
Group the like terms and combine them.
= (4ab - 2ab) + 3a - 1
= 2ab + 3a - 1
14. Answer :
= (3y2z - 2) + (5 - 2y2z)
= 3y2z - 2 + 5 - 2y2z
Group the like terms and combine them.
= (3y2z - 2y2z) + (-2 + 5)
= y2z + 3
15. Answer :
= (3a - b) + (4b + c) + (2c - 3a)
= 3a - b + 4b + c + 2c - 3a
Group the like terms and combine them.
= (3a - 3a) + (-b + 4b) + (c + 2c)
= 0 + 3b + 3c
= 3b + 3c
16. Answer :
= (3x2 + xy2) + (5x2 - 2x2y) + (5xy2 + 7x2y)
= 3x2 + xy2 + 5x2 - 2x2y + 5xy2 + 7x2y
Group the like terms and combine them.
= (3x2 + 5x2) + (-2x2y + 7x2y) + (xy2 + 5xy2)
= 8x2 + 5x2y + 6xy2
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