DSERT - 5 - Maths :: Mental Arithmetic

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[Contributor - Kripa S]

Objective: Explain approximation and estimation

Subtopics to be covered:

- Define approximation, estimation with examples

- Round off big numbers to nearest tens, hundreds etc

- Operations (+ , - , x , ÷) on 5-digit numbers and estimation

Learning Outcome:

- Students can round off a givien number to nearest asked place value.

- They can estimate value of a problem on addition, subtraction, multiplication and division for a big number

[Contributor - Kripa S]

http://ktbs.kar.nic.in/New/website%20textbooks/class5/5th-kannada-maths-2.pdf#page=23 (Kannada Medium)

http://ktbs.kar.nic.in/New/website%20textbooks/class5/5th-english-maths-2.pdf#page=23 (English Medium)

[Contributor - Kripa]

http://cdn.multiplication.com/sites/default/files/images/2014-03-10%2014_36_01.jpg (estimation)

http://slideplayer.com/38/10804509/big_thumb.jpg (rounding off units place)

http://www.kbcabinetmaking.com.au/unit3_making_measurements/section1_calculating/images/lesson1_using_a_calculator_6.jpg (rounding off decimals)

https://www.theschoolrun.com/sites/theschoolrun.com/files/content-images/rounding_hundreds.png (example to round off in 100s place)

[Contributor - Padmashree Sastry]

https://drive.google.com/open?id=0BzNF2YyqQxJ-eWs3WWlqX2RaNGs

[Contributor - Padmashree Sastry]

https://drive.google.com/open?id=0BzNF2YyqQxJ-T1NmXzFPQklYY1U

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