Subtract a one-digit number from a two-digit number – without regrouping

key notes :

Understanding the Concept:

• Two-digit numbers are numbers from 10 to 99 (e.g., 12, 34, 56).
• One-digit numbers are numbers from 0 to 9 (e.g., 3, 5, 7).
• Subtraction involves taking away or removing a number from another.

Step-by-Step Process:

• Align the Numbers: Write the two-digit number and the one-digit number one under the other.
• Start from the Ones Place: Subtract the ones digits first. Ensure that the number in the ones place of the top number is greater than or equal to the bottom number.
• Subtract in the Tens Place: Move to the tens place and subtract the tens digits, if necessary.

No Regrouping:

• This type of subtraction does not require borrowing or regrouping. It works when the number in the ones place of the top number is larger than the number in the ones place of the bottom number.

Examples:

• 72 – 4 = 68 (Start by subtracting 4 from 2, then subtract 0 from 7).
• 54 – 3 = 51 (Start by subtracting 3 from 4, then subtract 0 from 5).

Learn with an example

Let’s practice!