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To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: Align the numbers, and , by their decimal points:
Step 2: Subtract each digit starting from the rightmost end (tenths place). Subtract from to get .
Then subtract from to get .
Step 3: Make sure to align the decimal point in the answer with the other decimal points. The result is .
Therefore, the solution to the problem is .
2.6
Choose the correct writing form:
Lining up decimal points ensures you're subtracting like place values - tenths from tenths, ones from ones. Without proper alignment, you'll get the wrong answer every time!
In , the first number (6.8) is the minuend and goes on top. The second number (4.2) is the subtrahend and goes below with a minus sign.
Use addition to check! Add your answer to the number you subtracted. If you get the original first number, you're right: ✓
Always make them line up! You can add zeros to the right if needed. For example, if subtracting 3.25 - 1.8, write it as 3.25 - 1.80 so the decimal points align perfectly.
Yes, borrowing works the same way! If you need to subtract 5 from 3 in any place value, borrow from the next place to the left, just like with whole numbers.
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