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Let's solve this problem step by step.
Step 1: Identify the numbers to be added:
We have and .
Step 2: Perform the addition:
- Align the numbers according to their place values:
+
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- Add the digits in the ones place:
- Add the digits in the tens place:
Thus, combining these, the sum 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?
Lining up numbers by place value ensures you're adding ones to ones and tens to tens. Without proper alignment, you might accidentally add a ten to a one, giving the wrong answer!
Always start with the rightmost column (ones place) and work your way left. This builds good habits for when you need to carry numbers in harder problems.
Try these methods:
Yes! You can use mental math tricks: Think of 40 as 45 - 5, so 55 + 40 = 55 + 45 - 5 = 100 - 5 = 95. This works great when numbers are close to multiples of 10.
Numbers ending in zero are actually easier to add! The zero in the ones place means you just copy the other number's ones digit. Focus on adding the tens place carefully.
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