Comments on: Standard and Expanded Notation

By: Brian

Brian — Fri, 14 Oct 2011 15:25:38 +0000

Basically, you can call it anything you want. But if you want to communicate with other people, it’s best to stick with standard terminology. There may be esoteric reasons for individual situations that mathematician’s may do that, but I don’t think looking for exceptions when you are just learning is a good strategy.
http://www.mathmojo.com/chroni.....ments-form
Of course, I could be wrong (that’s my default) so take this all with a grain of salt. But unless you know specific reasons for not doing so, I’d stick with the standard methods and terminology.

By: robyn

robyn — Fri, 14 Oct 2011 10:56:20 +0000

I am curious about this…

take the number 47.
I can write it in expanded notation as 40+7 or 4(10) + 7(1)

what if I decompose the number to
30+17 or 3(10)+17(1) – can I still call this expanded notation?

By: alex

alex — Thu, 08 Sep 2011 15:35:35 +0000

im doing 8th grade homework i need help on how to write 467,149 in expanded notation.

By: Brian

Brian — Tue, 30 Aug 2011 00:15:04 +0000

Dina,
I have a sneaking suspicion that this is the kind of vague question that means nothing, but seems like it needs a specific answer. I’m not sure what your teacher is getting at, unless s/he wants some trite answer like, “it is used to represent the fact that there is nothing in a particular column” or something like that. Please write back in a comment and let me know what the teacher wanted for an answer. I may be wrong, but it seems like the question is meant to be “busywork.” I am really curious, and hope that I am wrong, and we’ll all have something to learn from the question and the answer.

By: Dina

Dina — Mon, 29 Aug 2011 23:24:36 +0000

3rd grade homework…..how is a zero used in standard form, expanded notaion, and word form…(help)

By: amanda

amanda — Sun, 10 Jul 2011 14:49:27 +0000

what a lovely site my daughter has found teacher….

By: Brian

Brian — Thu, 09 Sep 2010 04:24:34 +0000

Marie,

Make sure you’ve read the post at http://mathmojo.com/interestin…..ation.html

That would make sure you know that 34 in expanded notation is (3 x 10) + (4 x 1). So far so good?

.98 is only slightly trickier. The 9 signifies 9/10, which would be (9 x .1) because 1/10 is written as .1 as a decimal.

Can you guess how we’d write 8/100? 1/100 is written as .01 as a decimal, so 8/100 would be 8 x .01.

Therefore, 34.98 could be expressed in expanded form as (3 x 10) + (4 x 1) + (9 x .1) + (8 x .01)

Please let me know if that helped.

Brian (a.k.a. Professor Homunculus)

By: Brian

Brian — Thu, 09 Sep 2010 04:05:23 +0000

Emily,

Do you know how to add the two as decimals? 97 hundredths plus 7 hundredths equals 104 hundredths (or one “whole” and four hundredths, which is written as 1.04). Add that to 11 and get 12.04, which is read as
“twelve and four hundredths.”

From their it should be clear: twelve and four hundredths is the same as 12 4/100. Reduce it to simplest terms if you like, )but no law says you must – regardless of what schools say.)

By: Emily

Emily — Wed, 08 Sep 2010 23:07:06 +0000

I hate 5th grade math?!?! UGGGGG.

Daughter came home needing how to write out decimals in standard form but in fractions?! Help.

.97 + 11.07

[but like I said - has to be written out as fractions]

By: marie

marie — Wed, 08 Sep 2010 20:48:18 +0000

help me. 34.98 expand notation?