Try out backward...mumof8 wrote:Hi again can anybody help me solve this problem? Last revision before Math paper tomorrow TIA!!!

There were 137 balls in Box A and 195 balls in Box B. James removed some balls from Box B and put them into Box A. In the end, Box A had 3 times as many balls as Box B. How many balls did he removed from Box B ?

## Q&A - P4 Math

### Re: Q&A - P4 Math

### Re: Q&A - P4 Math

Hi anyone can help me with this problem sum ? TIA!!

Diane spent $39 on some books and 4/7 of her original amount of money on some stationery.

She had $9 left. How much money did she spend ?

Diane spent $39 on some books and 4/7 of her original amount of money on some stationery.

She had $9 left. How much money did she spend ?

### Re: Q&A - P4 Math

mumof8 wrote:Hi anyone can help me with this problem sum ? TIA!!

Diane spent $39 on some books and 4/7 of her original amount of money on some stationery.

She had $9 left. How much money did she spend ?

- sevenseals
- GreenBelt
**Posts:**109**Joined:**Tue Dec 30,**Total Likes:**9

### Re: Q&A - P4 Math

Most of the word problems are multi-step in nature as compared to the simple single-step problems elsewhere. In fact some are algebra questions but students have to do it using non-algebraic methods. How to solve this Singapore Math problem without algebra?

"Chris is 42 years younger than his grandfather. Last year, his grandfather was 4 times as old as he was. How old is Chris this year?"

Singapore math curriculum & worksheets used in USA

"Chris is 42 years younger than his grandfather. Last year, his grandfather was 4 times as old as he was. How old is Chris this year?"

Singapore math curriculum & worksheets used in USA

Last edited by sevenseals on Mon Dec 14, 2015 8:25 pm, edited 2 times in total.

### Re: Q&A - P4 Math

The answer is shown in bar model below:sevenseals wrote:Most of the word problems are multi-step in nature as compared to the simple single-step problems elsewhere. In fact some are algebra questions but students have to do it using non-algebraic methods. How to solve this Singapore Math problem without algebra?

"Chris is 42 years younger than his grandfather. Last year, his grandfather was 4 times as old as he was. How old is Chris this year?"

Singapore math curriculum & worksheets used in USA

- edlynnalexander
- OrangeBelt
**Posts:**95**Joined:**Sat May 05,**Total Likes:**1

### Re: Q&A - P4 Math

[quote="sevenseals"]Most of the word problems are multi-step in nature as compared to the simple single-step problems elsewhere. In fact some are algebra questions but students have to do it using non-algebraic methods. How to solve this Singapore Math problem without algebra?

"Chris is 42 years younger than his grandfather. Last year, his grandfather was 4 times as old as he was. How old is Chris this year?"

"Chris is 42 years younger than his grandfather. Last year, his grandfather was 4 times as old as he was. How old is Chris this year?"

### Re: Q&A - P4 Math

Mr Tan gave sweets to all his nephews. If he gave each nephew 6 sweets, he would be short of 12 sweets. If he gave 4 sweets to each nephew, he would have 4 sweets left.

a) how many sweets does Mr Tan have?

b)how many nephews does Mr Tan have?

a) how many sweets does Mr Tan have?

b)how many nephews does Mr Tan have?

### Re: Q&A - P4 Math

To give 2 more sweets, he needs 16 (4+12)sweets. Hence, mr Tan has 8 (16/2)nephews.angel wrote:Mr Tan gave sweets to all his nephews. If he gave each nephew 6 sweets, he would be short of 12 sweets. If he gave 4 sweets to each nephew, he would have 4 sweets left.

a) how many sweets does Mr Tan have?

b)how many nephews does Mr Tan have?

Mr Tan has 36 sweets [ 8 * 4 + 4]

### Re: Q&A - P4 Math

Can you explain using model examples? I do not understand your workings. Thanks a lot.nicnac wrote:To give 2 more sweets, he needs 16 (4+12)sweets. Hence, mr Tan has 8 (16/2)nephews.angel wrote:Mr Tan gave sweets to all his nephews. If he gave each nephew 6 sweets, he would be short of 12 sweets. If he gave 4 sweets to each nephew, he would have 4 sweets left.

a) how many sweets does Mr Tan have?

b)how many nephews does Mr Tan have?

Mr Tan has 36 sweets [ 8 * 4 + 4]

### Re: Q&A - P4 Math

Hi angelangel wrote:

Can you explain using model examples? I do not understand your workings. Thanks a lot.

Good Morning.

Here’s a slide for a similar question discussed earlier in the forum.

Mrs Toh bought some chocolates to distribute to her class. If each child gets 2 chocolates, she would be left with 40 chocolates. If each child gets 4 chocolates, she would need 30 more chocolates.

a) How many children are there in her class

b) How many chocolates did Mrs. Toh have at first.

When students are able to understand the logic behind the solution, MD might not be necessary.

Hope this helps.

Best wishes