Add/Subtract Comparisons - Vocabulary Investigation

The definiton for difference is:

• a set of 3 numbers that can be combined to create a number of equations.

• the result of subtracting two numbers.

• a letter that represents an unknown.

• the result of adding two or more numbers.

• to explain or show the similarities or differences between items or ideas.

Answer explanation

5 is the difference of 7 - 2.

The definiton for sum is:

• a set of 3 numbers that can be combined to create a number of equations.

• the result of subtracting two numbers.

• a letter that represents an unknown.

• the result of adding two or more numbers.

• to explain or show the similarities or differences between items or ideas.

Answer explanation

7 is the sum of 2 + 5.

The definiton for compare is:

• a set of 3 numbers that can be combined to create a number of equations.

• the result of subtracting two numbers.

• a letter that represents an unknown.

• the result of adding two or more numbers.

• to explain or show the similarities or differences between items or ideas.

Answer explanation

2 < 5 < 7 compares the numbers using inequalities.

The definiton for variable is:

• a set of 3 numbers that can be combined to create a number of equations.

• the result of subtracting two numbers.

• a letter that represents an unknown.

• the result of adding two or more numbers.

• to explain or show the similarities or differences between items or ideas.

Answer explanation

The variable in the equation n + 2 = 7 is n.

NEW. The definiton for fact family is:

• a set of 3 numbers that can be combined to create a number of equations.

• the result of subtracting two numbers.

• a letter that represents an unknown.

• the result of adding two or more numbers.

• to explain or show the similarities or differences between items or ideas.

Answer explanation

Since 5 + 2 = 7, then 2, 5, & 7 form a fact family.

The result of subtracting two numbers is a:

• difference.

• sum.

• compare.

• variable.

• fact family.

Answer explanation

5 is the difference of 7 - 2.

The result of adding two numbers is a:

• difference.

• sum.

• compare.

• variable.

• fact family.

Answer explanation

7 is the sum of 5 + 2.

To explain or show the similarities or differences between items or ideas is to:

• difference.

• sum.

• compare.

• variable.

• fact family.

Answer explanation

7 > 5 > 2 is an inequality which compares 2, 5 & 7.

A letter that represents an unknown is a:

• difference.

• sum.

• compare.

• variable.

• fact family.

Answer explanation

Since 7 - x = 2, then x is a variable.

NEW. A set of 3 numbers that can be combined to create a number of equations (or inequalities) is called a

• difference.

• sum.

• compare.

• variable.

• fact family.

Answer explanation

Since 7 - 5 = 2, then 2, 5 & 7 form a fact family.