The blog postings are about the Singapore Math. The readers can learn from the postings on Solving Singapore Primary School Mathematics. The blog presents the Math Concept, the Math Questions with solutions that teaches in Singapore Primary Schools. You or the kids can learn how to deal with the Math Modeling, the Math Problem Solving and the Problem Sum from Lower Primary School to Upper Primary School level. This posting is an upper primary school math question on Fraction and Problem Sum.

The story on Sarin’s family attend concert at the Esplanade you can read postings on **Sarin’s family attend concert at the Esplanade** in Welcome category and **Sarin’s family attend concert at the Esplanade Part 2 (Math Question)****.**

You should click and read the posting on **Sarin learns the concept of Fraction (mathematics concept)** to understand Portion or Fraction.

**Upper primary school mathematics question UPQ475**

In the Esplanade library, 3/5 of the books are English books. 620 of the English books have been loaned out. 2/7 of the remaining English books are fiction books while the other 350 English books are non-fiction books. How many books are there in the Esplanade library?

Solution:

The flow model

Start from the remaining

5/7 fraction of the remaining is non-fiction books and is 350 books

Per the above remaining math model

5 units = 350

1 unit = 70

The number of books remaining = 7 × 70 = 490

The total number of English books = 490 + 620 = 1110

3/5 fraction of the total number of books is English books

Per the math model for total number of books

3 units = 1110

1 unit = 370

Total number of books in the Esplanade library = 5 × 370 = 1850

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