Question

When you subtract mixed numbers, how do you know when you need to regroup?

Answer 1

Is there an example attached to this problem?

Answer 2

Nope.

Answer 3

To subtract mixed numbers, the following procedure is followed:
Step 1: Convert all mixed numbers to improper fractions.
Step 2: Subtract the fractions
Step 3: If the result is an improper fraction, convert it into a mixed number, and if not, leave it as a proper fraction, the answer.

Answer 4

Will that help?

Answer 5

It will be easier to explain if give some example or problem.
e.g. 3 1/4 – 2 1/2
= (3 + 1/4) – (2 + 1/2)
= 3 – 2 + 1/4 – 1/2
= 1 – 1/4
= 3/4

Answer 6

(3+1/4)-(2+1/2) \[\left(\frac{13}{4}\right)-\left(\frac{5}{2}\right) \]\[\left(\frac{13}{4}\right)-\left(\frac{10}{4}\right)=\frac{3}{4} \]

Answer 7

@messiahcollins