Lesson 16 Subtract Within 1,000
Let’s subtract in a way that makes sense.
Warm-up True or False: Equations Based on Place Value
Decide if each statement is true or false. Be prepared to explain your reasoning.
3 tens 4 ones 2 hundreds 3 tens 14 ones
3 tens 4 ones 1 hundred 13 tens 4 ones
13 tens 4 ones 1 hundred 12 tens 14 ones
Activity 1 Jada’s Thinking
Discuss how Jada’s equations match Lin’s diagram.
Finish Jada’s work to find the value of
Jada is thinking about how to find the value of
Jada says she knows a way to count on to find the difference. She showed her thinking using a number line.
Explain Jada’s thinking.
Jada says you can’t decompose to find the value of
because there aren’t any tens. Do you agree with Jada? Use base-ten blocks, diagrams, or other representations to show your thinking.
Activity 2 Find It Your Way
Find the value of each expression in a way that makes sense to you. Show your thinking. Organize it so it can be followed by others.
Find the value of each difference in a way that makes sense to you. Show your thinking.