In this lesson, we will learn how to use different strategies to subtract numbers with up to four digits efficiently.
Q1:
Natalie wants to calculate 4,000−256. She thinks that if she changes the subtraction to 3,999−255, it will be easier to calculate.
Using Natalie’s method, what is 5,000−3,665?
Q2:
Chloe is calculating 545−29.
She knows that it is easy to subtract 10s, so she solves the calculation in two steps: 545−30=515 and 515+1=516.
Following Chloe’s method, what is 656−19?
Q3:
What is 255 less than 3,565?
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