MCI - Worchester State University Singapore Math Institute Classroom Session A2
-
Upload
jimmy-keng -
Category
Technology
-
view
1.164 -
download
1
description
Transcript of MCI - Worchester State University Singapore Math Institute Classroom Session A2
![Page 1: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/1.jpg)
CLASSROOM SESSION A2 Whole Numbers Addition & Subtraction
DRILL & PRACTICE AND
PROBLEM SOLVING CAN HAPPEN SIMULTANEOUSLY
Slides are available at www.banhar.blogspot.com
and Marshall Cavendish Institute’s Facebook
![Page 2: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/2.jpg)
![Page 3: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/3.jpg)
Worchester State University, USAAfter participants were able togenerate possible arrangements,they observed various patternsincluding the fact that the totals areconsecutive whole numbers.
An extension task was assigned. Participants wereasked if the total could ever be 99 and if so, usingwhat set of numbers and what number will be inthe middle square.
![Page 4: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/4.jpg)
Worchester State University, USA
![Page 5: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/5.jpg)
![Page 6: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/6.jpg)
![Page 7: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/7.jpg)
Worchester State University, USA
![Page 8: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/8.jpg)
![Page 9: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/9.jpg)
+
![Page 10: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/10.jpg)
Worchester State University, USA
The class got the lowestpossible sum as 356 andthe highest possiblesum as 981.
Can you find sumswhich are lower /higher than those?
Or can you reason thatthose are the lowest /highest possible sum?
![Page 11: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/11.jpg)
+
![Page 12: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/12.jpg)
Make numbers so thatthe total is as close to 20as possible.
The winner is the onewho can make numbersthat add up to a totalclosest to 20.
![Page 13: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/13.jpg)
Pick any 3 digits.Make a 3-digit number.Make a different 3-digit number.
Find the difference.Write the difference down.
Circle one of the digits in the difference.Add up the rest of the digits.
Tell me the sum and I will tell you the digit you circled.
![Page 14: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/14.jpg)
![Page 15: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/15.jpg)
![Page 16: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/16.jpg)
Pick any number less than 20.Take turns to subtract 1, 2 or 3 until it becomes zero.This is a game for 2 persons.
The one who get to zero is the winner.
![Page 17: MCI - Worchester State University Singapore Math Institute Classroom Session A2](https://reader033.fdocuments.us/reader033/viewer/2022060202/559cf83f1a28ab901b8b45e5/html5/thumbnails/17.jpg)
p r o b l e m s o l v i n g
t
h
n
k
i
n
g
Procedural fluency is not sacrificed.