math problems with or without renaming...?

Question

so at first I thought I was stupid because I didn't understand my 2nd graders work, but I have asked a lot of people and no one else knows how to do it either. I am hoping someone here can help me, the example they gave is 38+5= 43, then you are supposed to say yes if you renamed it and no if you did not. They answer is yes, so how did they figure that out? Any help would be greatly appreciated. Thanks in advance

Answer 1

I feel your pain. This is busy work, to say the least. Renaming in this context refers to whether or not the various place-holders are changed (or "renamed") when you add the numbers together. In this example, when you add the digits in the "ones" column together, you get 13, so you "rename" that as 3 ones and 1 ten and add the 1 ten to the tens column.

To me, fussing with this concept, rather than just concentrating on the HOW, is busy work and just makes it more confusing. (That's a vent to our public education system -- not to you.)

Anyway, I hope that helped shed some light. Please feel free to email me additional items and I'll help work them out and explain whether or not "renaming" was involved.

Answer 2

Renaming the Date Math
Suggested Grades 1-3

Objective Students will practice their addition, subtraction, multiplication, and/or division skills to "rename" the date. Through this activity students will also be exposed to many different equations that have the same answer.

Materials
paper
writing utensils

Method
Ask students to look at the date and then figure out how many different ways they can rename the date through equations.

Use the website below to help your kids it is a great resource
Example: If the date is May 18, here are some different ways of renaming it.

May 3+15

May 10+8

May 2+5+11

May 9x2

May 1+3+2+6+4+2
etc....
Try doing this activity as a daily opener with whatever operation you are working on.

Answer 3

"Free your..." is correct. If you have to "carry" the 1, you have renamed, because the 13 is thought of as being 3 ones and 1 set of ten. The one set of ten is "carried" over to the tens' place in the form of a 1.

In an addition problem such as 15+3= 18, you would not be renaming because you are not "carrying" anything over to the tens' place. You write an 8 for the answer in the ones' place, and you do not have to do anything extra before you can add the tens' place, so therefore you are not renaming.

However, these kinds of math problems do not have to be solved by adding the two columns separately, as many of us were taught as students (and as your child's teacher seems to want the students to do.) With your example, 38+5=43, a student could have added in his/her mind, and therefore never actually renamed at all. However, it sounds as though your child's teacher wants the students to add and understand the "columns" way of doing the problem.

Answer 4

How do you rename a math problem?
I have NEVER heard of a question like this!!!!!!!!

Answer 5

just guessing, i would say no. you didn't change anything. GoodLuck.