Find the value of each expression mentally.

1. Here are 2 addition expressions. Think of at least 2 different ways to find the value of each sum mentally.

2. Here are 3 subtraction expressions. Think of at least 2 different ways to find the value of each difference mentally.
3. Can you write a fourth subtraction expression that uses the same strategy you used to find the values of the other differences?

1. Here are 3 division expressions. Find the value of each quotient mentally and think about how they might be related.

   • ___________________

   Write a new division expression whose value can be found more easily after working through the first three expressions.

2. Here are 2 multiplication expressions. Analyze them and think about how they might be related.

   • ___________________

   • ___________________

   Write 2 new expressions. Explain your reasoning for each expression.

   

Here are 4 expressions you could use to start a Number Talk activity.

1. Choose one starting expression. Think of at least 2 different ways to find its value mentally.

2. Write 3 expressions to create a Number Talk activity.

   ___________________ (starting expression)

   ___________________

   ___________________

   ___________________

3. Create an answer key for your Number Talk. Include at least one way to find the value of each expression mentally.