Lesson 4 Another Look at the Standard Algorithm
Let’s subtract from numbers with zeros.
Warm-up Number Talk: Differences
Find the value of each difference mentally.
Activity 1 Lots of Zeros
Find the value of each difference.
Find the number that makes each expression true.
Activity 2 Ways of Finding Differences
To find the value of
Use both methods to find the difference of 20,000 and 472.
Kiran uses another method. Explain how Kiran found the value of
Which method do you prefer? Or do you prefer another way? Explain your reasoning.
Find the value of
. Show your reasoning.