Q.

Susan had 26 more sweets than Lina. Susan gave 48 sweets to LIna and got back 18 sweets back from Lina. Lina then had twice as many sweets as Susan. How many sweets did Lina have at first?

**Draw a model and show the transfer.**

Academic support for Primary 4

- kiasuchabo
- OrangeBelt
**Posts:**98**Joined:**Wed Jan 18,

Post
by **kiasuchabo** » Tue Jun 30, 2020 7:35 pm

Hi , anyone here know how to solve this problem sum? The answer is 38. Thanks.

Q.

Susan had 26 more sweets than Lina. Susan gave 48 sweets to LIna and got back 18 sweets back from Lina. Lina then had twice as many sweets as Susan. How many sweets did Lina have at first?

**Draw a model and show the transfer.**

Q.

Susan had 26 more sweets than Lina. Susan gave 48 sweets to LIna and got back 18 sweets back from Lina. Lina then had twice as many sweets as Susan. How many sweets did Lina have at first?

Post
by **zac's mum** » Tue Jun 30, 2020 10:43 pm

My solution below. May I know which school’s paper is this?kiasuchabo wrote: ↑Tue Jun 30, 2020 7:35 pmHi , anyone here know how to solve this problem sum? The answer is 38. Thanks.

Q.

Susan had 26 more sweets than Lina. Susan gave 48 sweets to LIna and got back 18 sweets back from Lina. Lina then had twice as many sweets as Susan. How many sweets did Lina have at first?

Draw a model and show the transfer.

- kiasuchabo
- OrangeBelt
**Posts:**98**Joined:**Wed Jan 18,

Post
by **kiasuchabo** » Wed Jul 01, 2020 8:35 pm

Hi Zac's mum! Thanks very much! Got this from another parent , the question is from Xing Hua past year paper .

- kiasuchabo
- OrangeBelt
**Posts:**98**Joined:**Wed Jan 18,

Post
by **kiasuchabo** » Wed Jul 01, 2020 8:35 pm

Hi Zac's mum! Thanks very much! Got this from another parent , the question is from Xing Hua past year paper .

- kiasuchabo
- OrangeBelt
**Posts:**98**Joined:**Wed Jan 18,

Post
by **kiasuchabo** » Wed Jul 01, 2020 8:39 pm

Zac's mum, is there a technique or tips in solving this type of problem? Its so confusing .... to us hahaP

Post
by **zac's mum** » Wed Jul 01, 2020 9:02 pm

The model I drew is based on the P4 Onsponge guide book which I bought. I don’t really recommend the book (even though many parents rave about it) - I don’t think it provides very clear guidance.

If this is the correct technique, then it seems the model makes use of “cutting up” the model to show that the transferred amount actually contains smaller numbers that you can manipulate to calculate the answer.

I’m not certain this is the correct technique though. Gotta wait for my son’s school teacher to teach them. So far not yet. Why Xinghua so advanced

If this is the correct technique, then it seems the model makes use of “cutting up” the model to show that the transferred amount actually contains smaller numbers that you can manipulate to calculate the answer.

I’m not certain this is the correct technique though. Gotta wait for my son’s school teacher to teach them. So far not yet. Why Xinghua so advanced

- lovinglife
- KiasuGrandMaster
**Posts:**5425**Joined:**Wed May 23,**Total Likes:**4

Post
by **lovinglife** » Thu Jul 02, 2020 12:06 pm

P4 can use parts & units already right?

Post
by **zac's mum** » Thu Jul 02, 2020 12:23 pm

Already using units. What is “parts”?

Post
by **John Lim** » Thu Jul 02, 2020 1:01 pm

units -> x -> Ah Seng -> Romeo

parts -> y -> Ah Beng -> Juliet

actually,

parts & units -> Simultaneous equations

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