If we have 17 blocks and we add a further 25 blocks, how many blocks will we have in total?
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If we have 17 blocks and we add a further 25 blocks, how many blocks will we have in total?
To solve this problem, let's begin by stating the numbers involved in the addition:
- We start with an initial number of blocks: .
- Then, we add an additional number of blocks: .
We need to find the sum of these two numbers to determine the total number of blocks:
Let's compute the sum:
To find , we can add the numbers directly:
This calculation results in the total number of blocks being .
Therefore, the correct answer to the problem is .
If we have 85 blocks in total, how many blocks will remain if we remove 4 tens and 1 one?
When two digits add up to 10 or more, you write the ones digit and carry the tens digit to the next column. For example: 7+5=12, so write 2 and carry the 1 to add with the tens column.
Each place value can only hold one digit (0-9). When you get 12, that's really 1 ten and 2 ones, so the 1 belongs in the tens column and the 2 stays in the ones column.
Try subtraction! Take your answer and subtract one of the original numbers. You should get the other original number. For example: 42-25=17 ✓
Use the same process! Add column by column from right to left, carrying over when needed. You might carry more than 1 if you're adding many numbers.
Always start with the ones column! You need to know if there's a carry-over from the ones before you can correctly add the tens column.
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