Hint



4
5
–
2
3
Do you need to rename a ten to do this sum?
Yes
No
4
5
–
2
3
Now you can subtract the units!
Submit
4
5
–
2
3
2
Now you can subtract the tens!
Submit
5
1
–
3
7
Do you need to rename a ten to do this sum?
Yes
No
5
1
–
3
7
You must cross out the 5.
How many tens are there in the ten house now?
Submit
4
5
1
–
3
7
We bring the ten over to the units house.
There is already 1 unit here.
How many units are there in the unit house now?
Submit
4
11
5
1
–
3
7
Now you can subtract the units!
Submit
4
11
5
1
–
3
7
4
Now you can subtract the tens!
Submit