The number 53 is shown as units and tens below:
What number do you get if you add 28 units?
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The number 53 is shown as units and tens below:
What number do you get if you add 28 units?
To solve this problem, we will add the numbers by employing the method of columnar addition:
Therefore, the resulting number after adding 53 and 28 is .
If we have 67 blocks in total, how many blocks will remain if we remove 5 tens and 4 ones?
Each place can only hold one digit (0-9). When you get 11, that's really 1 ten and 1 unit, so you must split it up and carry the ten to the next column.
Carry over whenever your sum is 10 or greater. Write the ones digit in that column and carry the tens digit to the next column left.
Regrouping means exchanging units for the next higher place value. For example, 10 units = 1 ten, so we move that 1 to the tens column.
No! Always start with the rightmost column (units) and work left. You need to know if there's a carry-over before adding the tens.
Try counting all the blocks in the diagram! You should have 8 tens (80) plus 1 unit = 81 total. You can also use subtraction: ✓
Sometimes you might carry 2, 3, or more! Just write the ones digit and carry the rest. For example, if you get 23, write 3 and carry 2.
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