Final answer:
When adding multiples of ten and some ones, we can use the property of place value in our numbering system. Each place in our numbering system is ten times greater than the place to the right of it. To add multiples of ten, we only need to increase the tens place. For example, 30 + 40 is equal to 70.
Step-by-step explanation:
When adding multiples of ten and some ones, we can use the property of place value in our numbering system. Each place in our numbering system is ten times greater than the place to the right of it. To add multiples of ten, we only need to increase the tens place. For example, 30 + 40 is equal to 70. When adding ones, we add them in the ones place. For example, 50 + 7 is equal to 57. Combining these two concepts, we can add multiples of ten and some ones by adding the tens place and ones place separately. Let's take an example:
Example:
43 + 20
Step 1: Add the tens place. 4 + 2 = 6. So, the result has a tens place of 6.
Step 2: Add the ones place. 3 + 0 = 3. So, the result has a ones place of 3.
Therefore, 43 + 20 = 63.