Objectives:
- Determine the difference of a decimal and a whole number.
- Determine the difference of two multi-digit decimals that requires multiple regrouping.
What is a decimal?
A decimal is a number that has a whole number part separated by with a decimal point from the fractional part.
A decimal is a number that has a whole number part separated by with a decimal point from the fractional part.
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The whole number part is in front (to the left) of the decimal point. The fractional part is behind (to the right) the decimal point.
The decimal is read as the following: Eight and ninety-seven hundredths |
What does it mean to "borrow"?
Also known as "regrouping", we will "borrow" when we are subtracting two one-digit numbers where the top digit in a column is smaller than the bottom digit in the same column. For example, let's look at the difference of two one-digit numbers, 4 and 7. This would be 4 - 7. Since 4 is smaller than 7, we will need to "borrow" from the top digit in the column to the left. After borrowing, 4 - 7 would become 14 - 7. Now we can determine the difference since 14 is greater than 7. Now, let's look at an example below!
Also known as "regrouping", we will "borrow" when we are subtracting two one-digit numbers where the top digit in a column is smaller than the bottom digit in the same column. For example, let's look at the difference of two one-digit numbers, 4 and 7. This would be 4 - 7. Since 4 is smaller than 7, we will need to "borrow" from the top digit in the column to the left. After borrowing, 4 - 7 would become 14 - 7. Now we can determine the difference since 14 is greater than 7. Now, let's look at an example below!
The Difference of a Decimal and a Whole Number
For our first example, we will be looking at how to determine the difference of a decimal and a whole number. We can use the following steps to determine the difference of a decimal and a whole number:
Example #1
Your turn! Determine the difference of the following:
Click HERE to check your answer.
The Difference of Two Decimals
For our second example, we will be looking at how to determine the difference of two decimals. We can use the following steps to determine the difference of two decimals:
Example #2
Your turn! Determine the difference of the following:
Click HERE to check your answer.
The Difference of Two Decimals with Multiple Regrouping
For our third example, we will be looking at how to determine the difference of two multi-digit decimals that involve regrouping more than once. We can use the following steps to determine the difference of two multi-digit decimals that requires regrouping more than once:
Example #3
Your turn! Determine the difference of the following:
Click HERE to check your answer.