📚 Topic Summary
Subtracting decimals with regrouping is like subtracting whole numbers, but with an extra step: lining up the decimal points! When you don't have enough in a column to subtract, you'll need to borrow from the next column to the left, just like in regular subtraction. This "borrowing" is called regrouping. Mastering this skill will help you solve real-world problems involving money, measurement, and more!
🧮 Part A: Vocabulary
Match the term with its correct definition:
| Term |
Definition |
| 1. Decimal Point |
A. To borrow from the next place value to the left. |
| 2. Regrouping |
B. The number written as a fraction with a denominator of 10 or a power of 10. |
| 3. Decimal |
C. The process of subtracting one number from another. |
| 4. Subtraction |
D. The symbol used to separate the whole number part from the fractional part of a number. |
| 5. Difference |
E. The result of subtracting one number from another. |
Answer Key: 1-D, 2-A, 3-B, 4-C, 5-E
✍️ Part B: Fill in the Blanks
When subtracting decimals, it's important to line up the __________ points. If a number doesn't have enough in a place value, you need to __________. This means borrowing from the next larger place value to the __________. After subtracting, make sure the decimal point in your __________ is in the correct place. When you regroup, you are essentially changing the value of the numbers, but keeping the overall __________ the same.
Word Bank: left, decimal, regroup, difference, value
Answer Key: decimal, regroup, left, difference, value
🤔 Part C: Critical Thinking
Sarah wants to buy a toy that costs $15.75. She has $8.50 in her piggy bank and $4.25 in her wallet. Does she have enough money to buy the toy? Explain your answer showing all your work.