3-13 Equivalent Names

3-13 Equivalent Names

What is the same about all of these problems?

 $2+12$ ,  $7\times2$ ,  $15-1$ ,  $24-10$ 1 dozen and 2 more

Open Ended

Write another problems that belongs with these?

Mathematics Expression

• an expression is made up of numbers and symbols

• an expression has no

   $<>\ or\ =$  

• The problems in the Math Message are expressions

Name-Collection Box

• a way to show several equivalent names at once

• The math message is a collection of names for number 14

Open Ended

Can you think of other equivalent names for 14?

number 18 name-collection box

Which do not belong?

Multiple Choice

Which do not belong in a Name-Collection box for number 18?

• $9+9$

• $10+8$

• $\cdots\cdots\cdots\cdots\cdots\cdots$

• $2+9$

Open Ended

Share one name for number 20.

Multiple Choice

Which expressions do not belong in the name-collection box?

• half of 36

• $18\times1$

  
  

• $3+3+3$