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Overview
Grade 2 Math
B2. Operations
10. B2.4 Addition and Subtraction
10.12 Subtracting with digits up to 100
Two-Digit Subtraction up to 100
Learn how to subtract any two numbers up to 100 by lining up tens and ones, regrouping when needed, and checking your answer with confidence.
What You'll Learn
Line up two-digit numbers by place value, matching ones under ones and tens under tens.
Subtract the ones digits first, then the tens digits, working from right to left.
Regroup a ten into ten ones when the top ones digit is smaller than the bottom ones digit.
Check a subtraction like \( 52 - 27 = 25 \) by adding the answer back to the number you subtracted.
Use place value blocks or a number line to picture why borrowing works before relying on the written steps.
Watch for the common mistake of subtracting the smaller digit from the larger one in the wrong order.
What You'll Practice
1
Subtracting two-digit numbers without regrouping
2
Subtracting two-digit numbers with regrouping
3
Solving vertical subtraction problems up to 100
Why This Matters
Subtraction with two-digit numbers is essential for everyday tasks like counting change, measuring distances, and solving problems in school and daily life. Mastering this skill builds your confidence with larger numbers and prepares you for more advanced math.
This Unit Includes
4 Video lessons
Practice exercises
Learning resources
Skills
Subtraction
Two-Digit Numbers
Place Value
Regrouping
Mental Math
ON Curriculum Aligned