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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

Grade 6 - Mathematics
12.48 Simplification of Expressions - III

Example: (7x-9y+7z) + (7x-9y-7z) - (6x+7y+6z) = _____ ?
Solution:
Removing the parenthesis and rearranging the terms, the expression = 7x + 9y + 7z + 7x- 9y - 7z - 6x - 7y - 6z
= 7x + 7x -6x - 9y - 9y - 7y + 7z - 7z - 6z
= 8x-25y-6z
Directions: Simplify the following algebraic expressions. Also write at least 10 examples of your own.
Q 1: (15x-7y+9z) + (9x-7y+10z) - (7x-9z+9y) = _____ ?
17x-23y-28z
23x-22y+24z
17x-23y+28z
-9x-9y+19z

 Q 2: (15x-9y+6z) + (15x-7y+9z) - (7x-9z+6y) = _____ ?
23x+22y+24z
23x-7y+24z
17x-23y+28z
23x-22y+28z

Q 3: (21x-7y) + (7x-9y) - (7x-9y-7z) = _____ ?
8x-9y-17z
21x-7y+23z
9x-7y+23z
21x-7y+7z

 Q 4: (15x-7y+6z) + (15x-6z+6y) - (6x-7y+7z) = _____ ?
15x-24y+23z
23x-22y+24z
23x-22y-24z
24x+6y-7z

Q 5: (7a-9b+7c) + (6a-6b+15c) - (7a-17b) = _____ ?
6a-2b+23c
6a+2b-23c
8a-6b
6a-2b+15c

 Q 6: (7x-7y-9z) + (7x-9y+7z) - (9x-7y+15z) = _____ ?
9x+7y-23y
8x-9y-17z
9x-7y+23z
21x-7y+7z

Q 7: (7x-9y+7z) + (15x-9y+7z) - (7x+6y-9z) = _____ ?
24x+6y-7z
23x-22y+24z
15x-24y+23z
16x+24y+23z

 Q 8: (9x-7y+7z) + (9x-7y+9z) - (9x-7y-7z) = _____ ?
9x-7y+23y
6x-2y+23z
8x-9y-17z
8x-7y+23y

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 Question 10: This question is available to subscribers only!


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