Regroup a ten to subtract
2nd Grade Math practice: Solve 52 - 27.. Part of subtraction within 100 (Subtraction within 100).
~10 min
If there are not enough ones, regroup 1 ten as 10 ones.
Not Enough Ones
42
4 tens
2 ones
Sometimes the ones in the top number are fewer than the ones you need to take away. Then you cannot subtract the ones yet.
💡 Look at the ones digits first.