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Singapore 1A Error?


bluemongoose
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Oh we're just a few pages shy of this lesson. I don't think I'll say anything and see.

 

For those curious, the "pictorial" image shows 6 eggs remaining in a ten pack, and 4 broken ones outside the pack. Working on subtraction.

 

The Equation is:

 

10 (fill-in the proper mathematical symbol here, represented to the child as an empty circle) 6 = [unknown quantity, represented as an empty box).

 

So it would be 10 ( - ) 6 = [ 4 ] where you fill-in the missing elements. And in isolation it's mathematically correct. It just doesn't match the picture :lol:

 

I'm very curious to see if my son accepts the equation as mathematical in the equation, or if the discrepancy will offend. Hmmm?

 

Bill

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We used the US edition of 1, so I don't recall whether we had the same problem or not, but wouldn't it work as the "whole" - "part" = "part" model?

If the picture didn't show the broken eggs at all and asked how many eggs had been used, then you'd have 10 - 6 = ?? and it would match the picture.

 

Maybe it just depends on what types of problems were nearby.

 

Errata for the new texts are here and Jenny has been great when I've caught errors and emailed her.

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We used the US edition of 1, so I don't recall whether we had the same problem or not, but wouldn't it work as the "whole" - "part" = "part" model?

If the picture didn't show the broken eggs at all and asked how many eggs had been used, then you'd have 10 - 6 = ?? and it would match the picture.

 

Maybe it just depends on what types of problems were nearby.

 

Errata for the new texts are here and Jenny has been great when I've caught errors and emailed her.

 

It does still work as "whole - part = part" model. But the picture still offends our linguistic sense, since it shows 4 parts that have been taken away from ten, rather than six parts.

 

Bill

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That problem came up for us last month. Dd5 definitely noticed it and pointed out that there were only four broken eggs.

 

Maybe throwing in an incorrect problem here and there is a good way of seeing if the concepts they are learning are sticking. :D

 

As they say in the soft-ware business" "it's not a "bug", it's a "feature." :D

 

Bill

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So we did these pages last night.

 

My son filled in the "minus" sign and the 4 without blinking. Then pointed out the picture was wrong.

 

What really pleased me though, was, of his own initiative

(because I sometimes set this up myself) that he wrote out the "number bonds" alongside the equations for each of the exercises in this section.

 

So what-ever "error" this might have been, I'm so loving what this method seems to be building.

 

Bill

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