Hairu shares his stickers part 65 (Math Question)

Standard

 

The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. The blog presenting the Math Concept, Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids will learn the skills of dealing with Math Question Solving, Math Modeling and Problem Sums from Lower Primary School to Upper Primary School level after read the postings. This posting is a lower primary school math question on Problem Solving.

Challenge yourself with the question before look out for the given solution‼!

Lower primary school mathematics question LPQ98

Hairu had 28 more stickers than Sarin. After Hairu gave away 5 stickers, he had twice as many beads as Sarin. How many stickers did Hairu have at first?

 Solution:

Given Hairu had twice as many stickers as Sarin finally, we can build the model for “at first” as below shown.

LPQ98-1

Per the model,

1U = 28 – 5 = 23

The number of stickers Hairu had at first = 2 × 23 + 5 = 51

Alternative Solution:

The number of stickers that Sarin had no change ==> 1U

The number of stickers that Hairu had at first ==> 1U + 28

After,

Hairu given away 5 stickers and he had twice as many of stickers as Sarin

The number of stickers Hairu had finally ==> 2U = 1U + 28 – 5 = 1U + 23

Since no change for Sarin

1U ==> 23 stickers

Hence,

The number of stickers Hairu had at first = 23 + 28 = 51

More Question on Problem Solving. Click here….

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s