Directions: Using the digits 1 to 9, at most one time each, fill in the boxes so that you would not need to regroup when you subtract. Make sure your number is less than 63.

Extension: Explain why you do NOT need to regroup using your number.

### Hint

What is a number you can take away from 3?

### Answer

The student puts in a number less than 63 and contains a 0, 1, 2, or 3 in the ones place.

Source: Chase Orton

Does not come up as a PDF

63-52

63-12

63-45

63 – 51

63-42

63-31

63-21

63 – 32

63-53

63-51

63-42

63-12

63-51

I wonder if anyone from a middle school background wrote 63 – (-5). It meets the qualifications.

63-12, since there are less ones in 12 then 63 i do not have to regroup

63-41 would not require regrouping because the number to subtract has a value in both the ones and tens place that is less than the greater number. 1 < 3 and 4 < 6 This way no regrouping is required to solve the problem.

63-23. No need to regroup since there are two 3’s in the ones place that will give a 0 and in the tens place you have 6-2, which will give a 4

I need to make sure i am subtracting numbers less than the number in each place value.

63-23

Ones place must have a number that is the same or less value so you won’t have to rename/regroup

63-52

63-21

63-41

63-1=62

63-52=11

63-52=11

The number must be smaller than 63 and have a smaller number than 3 in the ones place in order to have no regrouping.

63-03 will not need regrouping because subtracting 3 form 3 in the ones place value gives a value of zero and leave 6 in the tens place

63-52=11

The numbers are smaller than the numbers in the tens and ones column.