1nbt5 Worksheets
Number and Operations in Base Ten
Use place value understanding and properties of operations to add and subtract.
5Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
1nbt5
1nbt5

- Find ten more or ten less than a two-digit number.
- Use place value to see how changing the tens digit changes the number.