Max Rescues the Smoothie Shop: Borrowing Blender Battle

About this Grade 2 Subtraction With Borrowing Drill

Subtraction-with-borrowing (or regrouping) is a critical leap in your second grader's math journey because it moves them beyond simple subtraction facts into two-digit problems they'll encounter daily. At ages 7–8, children are developing the abstract thinking needed to understand that ten ones can become one ten—a foundational concept for all future math. When your child borrows from the tens place to solve a problem like 32 − 15, they're not just memorizing a procedure; they're building number flexibility and place-value understanding that supports multiplication, division, and algebra later on. This skill also boosts confidence: mastering subtraction-with-borrowing shows children they can tackle problems that first seemed impossible. Real-world moments—like figuring out change at a smoothie shop or determining how many days until a birthday—suddenly become solvable without adult help.

What your student will practice

• Regroup tens as ones to solve two-digit subtraction problems accurately
• Identify when borrowing is needed by comparing ones digits
• Apply place-value understanding to subtraction across multiple problems
• Build fluency and independence with regrouping strategies

Common mistakes to watch for

The most common error is students subtracting the smaller digit from the larger digit without paying attention to which is in which place. For example, in 32 − 15, a child might see the 2 and 5 and subtract 2 − 5, getting a negative result, then guess wildly. Another frequent mistake is forgetting to reduce the tens digit after borrowing—solving 32 − 15 correctly up to the ones place but then subtracting from the original 3 tens instead of the borrowed 2 tens. Watch for problems where the answer doesn't make sense relative to the starting number, or where your child seems confused about why they "can't" subtract.