Adding and Subtracting Linear Expressions

Adding and Subtracting Linear Expressions

Method 1:
Align vertically

Method 2:
Group horizontally

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​Two methods of adding expressions

Method 1: Align Vertically

Method 2: Group Horizontally

Step 1: Keep, Change, Change. (add its opposite)

Step 2: Add the expressions

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​Subtracting Linear Expressions

Adding and subtracting linear expressions assessment

Multiple Choice

Find the sum:

(3x + 5) + (2x + 1) 

• 5x + 5
• 5x + 6
• x + 4
• 6x + 5

Multiple Choice

Find the sum:

(-m + 3) + (7m – 1)

• -8m + 2
• 6m + 2
• -8m + 4
• -6m + 2

Multiple Choice

Find the sum:  

(3d - 5) + (d + 3)

• 4d + 8
• 2d + 8
• 2d - 2
• 4d - 2

Multiple Choice

Find the sum:  

(3w - 8) + (-6w - 4)

• -3w + 12
• 9w + 12
• -3w - 12
• -9w - 12

Multiple Choice

Find the sum:  

(6 - k) + (4k + 1)

• 5k + 7
• 3k + 7
• 5k + 5
• 3k + 5

Multiple Choice

Find the Sum: 
(5 - t) + (3t +2)

• 2t + 7
• 2t + 3
• -2t + 3
• -2t + 7

Multiple Choice

Find the difference:
(8 - u) - (5u + 1)

• 6u + 7 
• -4u + 7
• -6u + 7
• 4u - 7

Multiple Choice

Find the difference:

(5x - 6) - (x + 2)

• 4x - 8
• 4x - 4
• 4x + 4

Multiple Choice

Find the difference:

(5x + 3) - (2x - 5)

• 3x + 8
• 3x - 2
• 7x + 8
• 7x - 2

Multiple Choice

Find the difference:

(6x + 9) - (4x + 6)

• 10x + 15

• 2x + 15

• 10x + 3

• 2x + 3

Multiple Choice

Find the difference:

(10x + 2) - (8x - 4)

• 2x - 2
• 2x + 6
• 18x + 6
• 18x - 2