Q&A - P3 Math

[ooptimizer]

If numbers are repeated like below, then:

Ans a) 6654 - 1023 = 5631
Ans b) 4012 - 3665 = 347

[atutor2001]

ooptimizer:

If numbers are repeated like below, then:

Ans a) 6654 - 1023 = 5631
Ans b) 4012 - 3665 = 347

For b) if there are repeat numbers, they must be used for the thousands place. Therefore, the 2 digits 6 are for the thousands place of the 2 numbers (6xxx & 6XXX), leaving digits 0,1,2,3,4,5

Now the hundreds place will have different digit. Fill that last.

Give the top 2 to the smaller number : 5,4
Give the last 2 to the bigger numer : 0,1

This leave digits 2,3. The smaller number will be 62xx and the bigger number will be 63xx

Therefore, the biggest possible smaller number is 6254 and the smallest possible bigger number is 6301

The smallest difference is 6301-6254=47

Like to try this one where the digits are not in running order?

0, 2, 3, 4, 5, 7, 8, 9

[ooptimizer]

Yes that’s right. Actually I was lazy, I just copy the previous answer and change the digits without checking. That’s why the answer is like that …

[ChiefKiasu]

atutor2001:

... Was away for a while, oh no the threads on math and science have no business. ...

atutor2001, it was 12 days before Christmas. We'll be branded as kiasu parents if we talk about math and science problems now, wouldn't we? :lol:

[mynewbz.016333hotmail.016333com]

Hi,


My child is in P3 this year. P3 will be learning division working. But I understand that they don’t learn time table anymore. I wonder how easy for them to solve division working? Any P4 parents can advise? Thanks.

[tutormum]

je:

Hi,


My child is in P3 this year. P3 will be learning division working. But I understand that they don't learn time table anymore. I wonder how easy for them to solve division working? Any P4 parents can advise? Thanks.

Teach them to do it the other way round. e.g. How many is 40 divide by 8? I'll ask the child what x 8 will give him 40. The child will depend on his 8 timetable to get the answer.

[kiasimom]

je:

Hi,


My child is in P3 this year. P3 will be learning division working. But I understand that they don't learn time table anymore. I wonder how easy for them to solve division working? Any P4 parents can advise? Thanks.

Hi je,

Multiplications and divisions should be taught in P2.

Didn't your child's school teach that? :?

[en107rn.01056yahoo.01056com.01056sg]

By end of P1, the kids are to know the concept of simple division and multiplication. Some memorization is needed after concept has been learnt.


Reading through je query, I think je is concern over long working division. This is covered in P3 math. I just flipped through ds P3 math text book & yes this is covered in P3. Is this what you are concern about je?

[mynewbz.016333hotmail.016333com]

EN:

By end of P1, the kids are to know the concept of simple division and multiplication. Some memorization is needed after concept has been learnt.


Reading through je query, I think je is concern over long working division. This is covered in P3 math. I just flipped through ds P3 math text book & yes this is covered in P3. Is this what you are concern about je?

EN, BINGO

They use skip counting at P1 & P2, no longer using time table. That's why I was wondering how they can solve the long division working easily...different from what we used to learn...

[edgem]

Hi I need help on this P4 problem sum :


If Lilian has double her sum of money she will have $200 more than John and 3 times more than Peter. If John and Peter have the same amount. How much does Lilian have at first.

Thanks!