Subtraction using Number Line
- Step 1: Begin by positioning the first number (21) as the starting point on the number line.
- Step 2: Next, progress from the first number by units equivalent to the second number towards the left. This is due to the descending nature of values on the number line toward the left. For instance, when subtracting 21 - 11, advance 11 units to the left. This progression leads to the number 10. Hence, 21 - 11 = 10.
The following animation demonstrates the Number Line method,
Watch the Animated Step-by-Step Solution
Unlike static calculators, this animation walks you through every single step of solving this problem. Press Play to watch the solution unfold — pause, replay, and learn at your own pace.
Each step is animated so you can see exactly how the solution is built — from writing the problem down to arriving at the final answer. This is not just an answer — it's a complete visual explanation.
Need support for a different topic? Write to usSubtraction using Regrouping or Borrowing
- Step 1: Arrange the numbers 21, 11 to align them properly in respective columns for ones, tens, hundreds, and Thousands… stacking them vertically.
- Step 2: Begin by subtracting the digits in the one's place. If the bottom digit is greater than the top digit, borrow 1 from the tens column which will be combined to the number at the one's place.
- Step 3: After giving 1 to the one's place, the number at the ten's place will be reduced by one number. Next, subtract the numbers at the one's place.
- Step 4: We apply step 2 to the remaining digits in two-digit and larger numbers. As and when we borrow, we subtract the numbers simultaneously. Finally, we get the answer as 10
The following animation demonstrates the Regrouping/Borrowing method,
Watch the Animated Step-by-Step Solution
Unlike static calculators, this animation walks you through every single step of solving this problem. Press Play to watch the solution unfold — pause, replay, and learn at your own pace.
Each step is animated so you can see exactly how the solution is built — from writing the problem down to arriving at the final answer. This is not just an answer — it's a complete visual explanation.
Need support for a different topic? Write to usSummary
What is 21 minus 11? The answer is 10. Subtract numbers using number line and place value method, animated solution steps, detailed instructions.
This page provided a complete animated walkthrough for what is 21 - 11. Every step was visualized so you can understand not just the answer, but the method behind it. Use the animation above to replay and study each step at your own pace.
📤 Share this solution
Explore Other Topics
Discover related mathematical topics and practice problems to expand your understanding. Each topic includes carefully selected examples to help you master the subject.
Addition
- What is sum of 298 + 35?
- What is sum of 123.45 + 678.92?
- What is sum of 432 + 289?
- What is sum of 6 + 7?
Decimals
- What is 1/5 as a decimal?
- What is 3/4 as a decimal?
- What is 2/3 as a decimal?
- What is 5/8 as a decimal?
Fractions
- What is 31% as a fraction?
- What is 2.75% as a fraction?
- What is 0.85% as a fraction?
- What is 3.50% as a fraction?
Mixed Number
- What is 315/71 as a mixed number?
- What is 1897/64 as a mixed number?
- What is 1205/35 as a mixed number?
- What is 725/16 as a mixed number?