How it works
Tens are like ones, only bigger. 5 tens take away 4 tens is 1 ten.
Take the tens digits and add a zero.
Check by adding back.
Worked examples
Tens from tens
- 50 − 40 = ?
- 5 tens take away 4 tens.
- 1 ten is left, which is 10.
- So the answer is 10.
A bigger one
- 90 − 60 = ?
- 9 tens take away 6 tens.
- 3 tens are left, which is 30.
- So the answer is 30.
Take all the tens
- ? = 90 − 90
- 9 tens take away 9 tens.
- Nothing is left, which is 0.
- So the answer is 0.
A taste of the worksheet
These are the first problems of set A. The printable sheet has many more, with an answer key.
- 40 − 30 = __
- __ = 50 − 20
- __ = 30 − 20
- 50 − 20 = __
- 50 − 30 = __
Words to know
- tens
- Groups of ten.
- take away
- To make less.
Watch out for
- Think in tens: 5 tens, not 50 ones.
- What is left is tens too.