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Evaluate the following expression and name the property used in each step:

823+21

Short Answer

Expert verified

The value of the expression is:823+21=21

Step by step solution

01

Step 1. Given information.

The given expression is:

823+21

02

Step 2. Write the concept.

The substitution property for multiplication, addition and subtraction is:

ab=ca÷b=ca±b=c

The property of additive inverse is:

a+a=0

And use the formula such that a3=a×a×a.

03

Step 3. Evaluate the expression.

The expression can be written as in below:

823+21=88+21=8+8+21           Property  of  Additive  Inverse=0+21         Substitution  Property=21

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