📚 Topic Summary
Vertical subtraction is a way to subtract numbers by writing them one above the other, making it easier to subtract each place value. When we subtract without regrouping, it means the top number in each column is always bigger than the bottom number. This makes the subtraction nice and straightforward! We just subtract the numbers in each column, starting from the right, and write the answer below.
For Grade 1, we will focus on subtracting numbers where the top digit is always greater than or equal to the bottom digit in each column. This way, we avoid the need to 'borrow' or 'regroup'.
🔤 Part A: Vocabulary
Match the words with their meanings:
| Word |
Meaning |
| 1. Difference |
A. The number we are taking away. |
| 2. Subtraction |
B. The answer we get when we subtract. |
| 3. Minus |
C. The process of taking away a number from another. |
| 4. Digit |
D. A symbol used to write numbers (0-9). |
| 5. Subtrahend |
E. The symbol that shows subtraction. |
(Answers: 1-B, 2-C, 3-E, 4-D, 5-A)
✍️ Part B: Fill in the Blanks
Complete the sentences using the words in the box: difference, subtraction, larger, smaller, vertical.
In ______ subtraction, we write numbers one above the other. The top number is always ______ than or equal to the bottom number. The answer in a subtraction problem is called the ______. The process itself is called ______.
(Answers: vertical, larger, difference, subtraction)
🤔 Part C: Critical Thinking
Why is it important to line up the ones place when doing vertical subtraction?