Estimation in numbers and measurement

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Presentation transcript:

Estimation in numbers and measurement Form 1 Mathematics Chapter 5 Estimation in numbers and measurement

Reminder Lesson requirement Before lessons start Textbook 1A Workbook 1A Notebook (and folder) Before lessons start Desks in good order! No rubbish around!

Estimation (p.189) An estimation is a rough guess on the actual values. It does not represent the real answer. In real life, we seldom bring a calculator with us. So, we can use estimation to make some decisions. To get a better estimation, we need some techniques to round off a number.

Estimation on measurement Benchmark Strategies Have reference Decomposition-recomposition Strategies Break into small, count, guess back the whole Measuring Groups of objects Measure large amount, then divide Using Formulas Calculate, then estimate Using Graph Papers Count squares: Full, > Half, < Half

Time for Practice Pages 209 – 211 of Textbook 1A Questions 1 – 10 Pages 97 – 98 of WB 1A Questions 1 - 7

Reminder Lesson Desk SHW (I) OBQ CBQ Get ready all the time! Be order all the time! SHW (I) 14 Jan (Mon) OBQ CBQ 16 Jan (Wed)

Enjoy the world of Mathematics! Ronald HUI Enjoy the world of Mathematics!