Chapter 3.3
Subtracting by 10s
What You'll Learn
Recognize that subtracting 10 reduces a number by one group of ten
Apply the concept of place value to subtract 10 from numbers up to 100
Understand how removing a tens block changes the tens digit by one
Calculate subtraction problems involving tens mentally and accurately
What You'll Practice
1
Subtracting 10 from two-digit numbers
2
Using visual tens blocks to model subtraction by 10
3
Solving equations that involve removing one group of ten
Why This Matters
Subtracting by tens builds your understanding of place value and mental math strategies you'll use every day. This foundational skill makes it easier to handle money, tell time, and solve more complex subtraction problems as you advance in math.
This Unit Includes
Practice exercises
Skills
Subtraction
Place Value
Tens
Mental Math
Number Sense
