Question

Help on theese 2 for brainly tell me why we need to regroup

Answer 1

Answer:

You will need to regroup because 2/3 is less than 3/4.

Step-by-step explanation:

DON'T IGNORE THIS PART!!!

Let's find the common denominator for 10 2/3 and 6 3/4.

$10 \frac{2}{3} - 6 \frac{3}{4}$

What is the least common multiple for 3 and 4? Well, let's make a list that would help!

Multiples of 3: 3, 6, 9, 12, 15, 18, 21...

Multiples of 4: 4, 8, 12, 16, 20, 24, 28...

What is the first multiple that 3 and 4 matches with? It is 12!

Now, let's convert the fractions.

$10 \frac{2}{3} - 6 \frac{3}{4}$ = $10 \frac{8}{12} - 6 \frac{9}{12}$

Woah! How do you subtract 9/12 from 8/12? Don't worry--there is a solution to this problem! And--it is... regrouping!

You have to add a whole to 8/12. This means that you have to add 8/12 + 12/12, which is 20/12. And--you will have to subtract one from ten.

$9 \frac{20}{12} - 6 \frac{9}{12}$

Now, that should be way easier to subtract!