2nbt8 Worksheets
Number and Operations in Base Ten
Use place value understanding and properties of operations to add and subtract.
8Mentally add 10 or 100 to a given number 100-900, and mentally subtract 10 or 100 from a given number 100-900.
2nbt8
2nbt8
- Find 10 more or 10 less than a number by changing the tens digit.
- Find 100 more or 100 less than a number by changing the hundreds digit.
- Use place value to keep the ones digit the same when adding or subtracting tens and hundreds.
- Do quick mental math with three-digit numbers without writing out long addition or subtraction.
