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To solve this problem, we'll follow these steps:
Now, let's work through each step:
Step 1: Add the ones digits:
Since the sum (15) is greater than 9, we write down the 5 in the ones place and carry over the 1 to the tens place.
Step 2: Add the tens digits with the carried-over 1:
Therefore, the result of adding 77 and 8 is:
The correct choice from the given options is 85.
85
\( \begin{aligned} &90 \\ +& \\ &~~9\\ &\underline{\phantom{776}} & \\ \end{aligned} \)
When adding digits gives a sum greater than 9, you write the ones digit in that column and carry the tens digit to the next column left. For example, means write 5 and carry 1.
Each column can only hold one digit! Writing 15 would mean putting two digits in one place, which breaks our number system. That's why we separate it: 5 stays, 1 moves left.
Yes! Always start from the ones place (rightmost column) and work left. This ensures you handle any carrying correctly as you move through each column.
If you're carrying to an empty column (like carrying to hundreds place when adding two 2-digit numbers), just write the carry digit in that new column. It becomes part of your final answer!
Try adding the numbers horizontally instead: . If you get the same answer both ways, you did it right!
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