We have hundreds of course questions with personalized recommendations + Account 100% premium
To solve this problem, we'll perform vertical subtraction with regrouping:
Step 1: Write the numbers vertically:
Step 2: Start with the units column (rightmost). We have .
Step 3: Since you can't subtract 9 from 8 directly without going negative, we regroup. Borrow 1 from the tens place of 88.
Step 4: Change the tens column: becomes tens and the units column becomes (since you borrowed 10).
Step 5: Now subtract: .
Step 6: Move to the tens column (now 7): Subtract 0 from 7 (since no tens are in 9): .
Therefore, the result of the subtraction is .
To conclude, the solution to the subtraction problem is .
79
\( \begin{aligned} &105 \\ -& \\ &~~~~3 \\ &\underline{\phantom{776}} & \\ \end{aligned} \)
Because 8 is smaller than 9! In subtraction, you can't take away more than you have without going negative. That's why we borrow from the tens place to make it 18 - 9.
Borrowing means taking 1 ten from the tens place and converting it to 10 ones in the units place. So 88 becomes 7 tens and 18 ones, giving us enough to subtract 9.
You need to borrow whenever the top digit is smaller than the bottom digit in any column. If you can't subtract without going negative, it's time to borrow!
The process is the same! Line up the digits by place value and start from the rightmost column. Borrow when needed, just like in this problem with 88 - 9.
Use addition to check! Add your answer to the number you subtracted. If you get the original number, you're right: ✓
Get unlimited access to all 18 Arithmetic Operations questions, detailed video solutions, and personalized progress tracking.
Unlimited Video Solutions
Step-by-step explanations for every problem
Progress Analytics
Track your mastery across all topics
Ad-Free Learning
Focus on math without distractions
No credit card required • Cancel anytime