Warm-up Number Talk: Products
Find the value of each expression mentally.
Activity 1 Partial Products, Recorded
Tyler used an algorithm to find the value of
How do you think he arrived at the last five numbers? Record your thinking. Be prepared to share it with a partner.
Use Tyler’s method to find the value of
. Then, draw a diagram to check your answer.
Activity 2 Han’s Multiplication Mishap
Decide with your partner who will find each product. Show your reasoning.
Here is Han’s computation of
What error or errors did Han make?
Show the correct computation for finding the value of
Here is an incomplete calculation that uses partial products of
Write multiplication expressions that the numbers 15, 180, 200, and 2,400 each represent. Then, find the value of
Find the value of the product