MUST-KNOW PSLE MATH PROBLEM 3

Question:

Three boys spent the same amount of money on printers.

Henry spent 2/5 of his money, Jonas spent 3/4 of his and Fred spent 2/3 of his.

They had a total of $1440  at first. How much of money did each boy spend?

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Answers:

Since Each boy spent the same amount of money, you make the numerator the same.

Henry                                    Jonas                                   Fred

2/5   x 3                                  3/4 x 2                                    2/3 x 3

6/15                                           6/8                                           6/9

The denominator now  represents the total Units they each had.

15 Units                                 8 Units                                   9 Units

TOTAl Amount: $1440

Total Units : 15+8+9= 32 Units

32 Units -> $1440

1 Unit -> $45

 Since Each of them Spent 6 units,

6 Units-> $45 x 6 = $270.

Each boy spent $270.

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KEY WORDS/THINGS TO LOOK OUT FOR?

1) It is a Fraction question

2) It has words like Spent/used the Same/Equal . 

I have made another similar sets of question  below for you to MASTER THE TECHNIQUE. Let us know what are your answers on our  Facebook Page “‘ https://www.facebook.com/SingaporeLearner/”.  All the best for your revision.

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Question 1:

Mary and Tom used the same number of beads to make jewelries.

Mary used 2/5 of hers and Tom used 3/4 of his. They both had a total of 2300 beads.

How many beads did each of them use?

 

Question 2 :

There are 540 people in Block A and Block B. 2/5 of the people in School A and 1/4 of the people in School B are Children. Given that there is an equal number of Adult in both Block A and Block B, how many Children are there in School A?

 

 

 

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