Jump to content

Menu

Singapore math 5A, textbook p. 25 problem 10


momto4kings
 Share

Recommended Posts

I'll take a stab at this. I'm not so great at the bar diagrams online. :tongue_smilie:

 

Set up the problem like this:

<----$45------>

[--John--][Paul]

 

[--John--][Paul]<-$65-$45->

 

<---------$65----------- --->

[--John--][Paul][Paul][Paul]

[--John--]<---Henry------->

 

 

The difference between John/Paul and John/Henry is 2 units, which is equivalent to $65-$45 ($20).

 

2 Units = $20 Therefore 1 Unit (Paul) = $10

 

If Paul ($10) and John spent $45 together, then $45-$10= $35 spent by John

 

Henry spent 3 x $10 ($30). With John they spent $65. So $65-$30 = $35

Edited by plain jane
Link to comment
Share on other sites

I'll take a stab at this. I'm not so great at the bar diagrams online. :tongue_smilie:

 

Set up the problem like this:

<----$45------>

[--John--][Paul]

 

[--John--][Paul]<-$65-$45->

 

<---------$65----------- --->

[--John--][Paul][Paul][Paul]

[--John--]<---Henry------->

 

 

The difference between John/Paul and John/Henry is 2 units, which is equivalent to $65-$45 ($20).

 

2 Units = $20 Therefore 1 Unit (Paul) = $10

 

If Paul ($10) and John spent $45 together, then $45-$10= $35 spent by John

 

Henry spent 3 x $10 ($30). With John they spent $65. So $65-$30 = $35

 

 

Thanks! That's it!

Link to comment
Share on other sites

Do the bar things confuse you too? Gosh I don't know what it is but the bar diagrams do NOT speak to me.

 

I've been using SM since K and it's only been this year that the bar diagrams are starting to speak to me in any sort of language that makes sense. :tongue_smilie: I still can't wrap my head around a lot of them but I must say that when they click, it's a darn good feeling.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...