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To solve the subtraction problem , follow these steps:
Write:
Subtract from :
.
Place in the units position.
Subtract from :
.
Place in the tens position.
Thus, after performing the subtraction, the result is .
Therefore, the solution to the problem is .
If we have 85 blocks in total, how many blocks will remain if we remove 4 tens and 1 one?
We start from the units place (rightmost column) because that's how place value works! Just like when you count money, you handle pennies before dollars. This also prepares you for harder problems that need borrowing.
In this problem, both and , so no borrowing needed! When the top digit is smaller, you'll need to borrow from the next column to the left.
Use inverse operations! Add your answer to the number you subtracted: . If you get the original number (), you're correct!
Yes, absolutely! Lining up place values prevents mistakes. Write tens above tens and units above units. This organization becomes even more important with larger numbers.
Place value tells you what each digit represents. In , the 7 means 7 tens (70) and the 9 means 9 units (9). Keeping these aligned is crucial for correct subtraction!
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