Q&A - P3 Math

[tianzhu]

crystal mom:

Hi!!

I need solution to the following maths problems:
1. \tAnne has five more 20 cents coins than 50 cents coins. The total amount of money she has is $4.50. How many of each coin does she have?

Hi

Another way is to use the \"Grouping concept\"

For five 20 cents coins, we have$1.

4.5 – 1 – 3.5

Consider a set or group of 20 cents coin and 50 cents coins. This gives a total of 70 cents.

5 groups will give $3.50

Hence, we have

10 20 cents coins

5 50 cents coins

Best wishes

[jolenekoh]

Kate had 120 beads less than Connie. Connie had 230 beads left after giving 80 beads to Kate. How many beads did they have altogether?

[Maths Hub]

jolenekoh:

Kate had 120 beads less than Connie. Connie had 230 beads left after giving 80 beads to Kate. How many beads did they have altogether?

Beads at start:
Connie: 1 unit
Kate: 1 unit - 120

Beads in the end:
Connie 230 (after giving 80 to kate)

In order to find Connie at start, we add back 80.

230+80=310

Kate at start: 310 - 120 = 190

Total at start: 190 + 310 = 500

Hope that helps.

[jolenekoh]

Thank you

Maths Hub:

jolenekoh:

Kate had 120 beads less than Connie. Connie had 230 beads left after giving 80 beads to Kate. How many beads did they have altogether?

Beads at start:
Connie: 1 unit
Kate: 1 unit - 120

Beads in the end:
Connie 230 (after giving 80 to kate)

In order to find Connie at start, we add back 80.

230+80=310

Kate at start: 310 - 120 = 190

Total at start: 190 + 310 = 500

Hope that helps.

[crystal mom]

Thanks all for your replies!!

[angel]

Amy and Betty shared 200 cookies. After Amy ate 30 cookies and Betty baked another 28 cookies, they had the same number of cookies. How many cookies did Betty have at first?

[angel]

Gopal wants to buy 8 bars of chocolatebut he is short of $3. If he buys 7 bars of chocolate, he will have $1 left. How much money does he have?

[tianzhu]

angel:

Gopal wants to buy 8 bars of chocolatebut he is short of $3. If he buys 7 bars of chocolate, he will have $1 left. How much money does he have?

Hi

The solution has been provided by Oldschool on page 221.

http://www.kiasuparents.com/kiasu/forum/viewtopic.php?f=66&t=149&p=999538#p999538

Best wishes

[angel]

Thank you tianzhu. How about the solution for first question?

[Oldschool]

angel:

Amy and Betty shared 200 cookies. After Amy ate 30 cookies and Betty baked another 28 cookies, they had the same number of cookies. How many cookies did Betty have at first?

Hi,

http://i44.tinypic.com/2zgt1cp.jpg\">

Regards