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 - Aadith Srinivasan]
1. Write “Thousand” , ”Hundred” ,” Ten ”,”One” on separate sheets of paper and ask 4 students to hold and stand in front of the class. Make 4 sets of number sheets from 0 to 9 and place them on the table .The teacher can call the students to represent a four digit number . After the number is called by the teacher the students can pick the number sheet from the table and stand in front of the students representing the place value.
2.
[Contributor - Padmashree Sastry]
https://drive.google.com/open?id=0BzNF2YyqQxJ-eWs3WWlqX2RaNGs
| Term' | 'Transliterated Term' | 'Translated Term' |
| Mental Arithmetic | ಮೆಂಟಲ್ ಅರಿತ್ಮೆಟಿಕ್ | ಮಾನಸಿಕ ಗಣಿತ |
| Estimate | ಎಸ್ಟಿಮೇಟ್ | ಅಂದಾಜಿಸು |
| Process | ಪ್ರೋಸೆಸ್ | ವಿಧಾನ |
| Approximation | ಅಪ್ರಾಕ್ಸಿಮೇಷನ್ | ಸಾಮೀಪ್ಯ ಬೆಲೆ |
| Sum | ಸಮ್ | ಮೊತ್ತ |
| Numbers | ನಂಬರ್ಸ್ | ಸಂಖ್ಯೆಗಳು |
| Difference | ಡಿಫರೆನ್ಸ್ | ವ್ಯತ್ಯಾಸ |
| Product | ಪ್ರಾಡಕ್ಟ್ | ಗುಣಲಬ್ಧ |
| Quotient | ಕೊಶೆಂಟ್ | ಭಾಗಲಬ್ಧ |
| Approximately same as | ಅಪ್ರಾಕ್ಸಿಮೇಟ್ಲಿ ಸೇಮ್ ಅಸ್ | ಸರಿಸುಮಾರು ಸಮನಾಗಿದೆ |
| Round off | ರೌಂಡ್ ಆಫ್ | ಅಂದಾಜಿಸು |
| Divisor | ಡಿವೈಸರ್ | ಭಾಜಕ |
| Dividend | ಡಿವಿಡೆಂಡ್ | ಭಾಜ್ಯ |
| Highest place | ಹೈಎಸ್ಟ್ ಪ್ಲೇಸ್ | ಗರಿಷ್ಟ ಸ್ಥಾನ |
[Contributor - Padmashree Sastry]
https://drive.google.com/open?id=0BzNF2YyqQxJ-T1NmXzFPQklYY1U
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