To subtract 91 from 99 do you need to regroup?explain

Regroup?

99 - 91 = 8

To subtract 91 from 99, regrouping is required.

Here's a step-by-step explanation:

1. Start by writing down the numbers vertically, with the larger number (99) on top and the smaller number (91) underneath.
99
-91

2. Begin the subtraction process by subtracting the ones place: 9 - 1 = 8. Write this result below the line, directly beneath the ones column.
99
-91
----
8

3. Now, move to the tens place: 9 - 9 = 0. Write this result below the line, directly beneath the tens column.
99
-91
----
08

4. Since we have finished subtracting all the digits, we can drop the leading zero, giving us the final result: 8.

In this example, regrouping wasn't necessary because the ones digit in 99 (9) is larger than the ones digit in 91 (1). However, it's always important to be aware of place value and recognize when regrouping might be needed.

Yes, you need to regroup when subtracting 91 from 99. Let me explain the process of regrouping.

To subtract two numbers, you start from the rightmost digit and work your way to the left. In this case, the rightmost digits are 1 and 9.

Since 1 is smaller than 9, you cannot directly subtract 1 from 9. In this situation, we need to regroup or borrow from the next higher digit.

To do this, you look at the next higher digit, which is in the tens place. In this case, it is a 9. We "borrow" one from the 9 in the tens place and make it 8. Then, we add 10 to the 1 in the ones place, making it 11.

Now, we can subtract 1 from 11, which equals 10. We subtract 8 from 9 in the tens place, which equals 1.

Therefore, subtracting 91 from 99 results in 8.