When you evaluate an expression, you find it's numerical value. To avoid confusion, mathmeticians have agreed on a set of rules called the Order of Operations.
The problem is: 6-(5-3)+10. First, do the parenthesis.
5-3=2. So it becomes: 6-2+10. Then do: 6-2, and it will become 4. So now it is: 4+10. Add. 4+10=14.
Remember, some problems will have all 6 operations. Just follow PEMDAS for the right answer
If a=5, b=4, and c=8
This is actually: 4(5)- 3(4)+1 or 4x5-3x4+1
Evaluate 4x5 and 3x4. 20 and 12. Subtract. 20-12= 8. Add the 1. 9. The final answer is nine (9).
Note: N(N) means multiply. (N is a variable for any number)
A mathematical sentence that contains an equal (=) sign is called an equation.
Ex. 7+8=15 3(6)= 18 x+2=5 (x is a variable)
Properties are open sentences that are true for any numbers.
Commutative Property looks like this.
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