How do you know if you need to ungroup a ten for ones when subtracting?

In this exercise we have to use the knowledge of subtraction to explain when it will be necessary to ungroup the numbers, so we have:

The ungroup strategy is used when a unit of the positive number in the subtractions is minor than the number under it.

Regrouping in arithmetic is when you create groups of ten when operating movements in the way that adding or deduction. This usually takes place when you work together double digits. However, technically, also, it takes place some occasion you have an answer that's taller 10.

For exemple:

See more about subtraction at link

The ungroup strategy is used when a unit of the positive number in the subtractions is minor than the number under it.

In the image attached, you have this case, you can observe that number 4 is less than number 8, this tend to be a problem for kids, because they think

How am I going to subtract more units than the number has?

Well, we fix this problem by ungrouping the first number, which in this case is 6, and one ten unit will be place with the 4, this will transform the numer 4 into 14, this way, the kid will be able to subtract 14-8, which is 6. Then, the 6 we ungrouped, it turnes a 5, so, we subtract next 5-2, which is 3. Giving 36 as a result.

answer: i'm not sure

step-by-step explanation:

plants store their excess carbohydrate in the form of starch so that it could be used as energy source later on. the excess carbohydrate is converted into starch in the plastid i.e. chloroplast & this process occurs in the presence of sunlight. it is an insoluble polymer of glucose which gets stored in cell organelles named as amyloplasts. in some plants, starch is also stored in roots and embryos.