Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our Privacy Policy and User Agreement for details.

Successfully reported this slideshow.

Like this presentation? Why not share!

- Make The Most 1st 2 Years Feedback ... by JPStrategy 679 views
- Problem Solving Tools by Engr. Abdun Noor 332 views
- Useful Tools for Problem Solving by Flevy.com 497 views
- Problem solving tools and technique... by Ramesh P.R. 62 views
- Problem Solving Tools - Susan by elsanora 2117 views
- Creative Problem Solving Practica... by JPStrategy 5572 views

1,344 views

Published on

Published in:
Education

No Downloads

Total views

1,344

On SlideShare

0

From Embeds

0

Number of Embeds

267

Shares

0

Downloads

95

Comments

0

Likes

1

No embeds

No notes for slide

- 1. singaporemathinaction<br />Session 3<br />mathematical problem solving<br />Yeap Ban Har<br />National Institute of Education<br />Singapore<br />www.banhar.com<br />
- 2. singaporemathinaction<br />
- 3. singaporemathinaction<br />Problem 1<br />How many paper clips are there in the box on your table?<br />
- 4. singaporemathinaction<br />Problem 2<br />Arrange the cards so that you can do the card trick shown to you.<br />
- 5. singaporemathinaction<br />Problem 3<br />How many three-fourths are there in 1 whole?<br />
- 6. Ateneo Grade School, Manila<br />How many three-fourths are there in one whole? <br />
- 7. singaporemathinaction<br />-<br />Problem 4<br />Give a 3-digit number and a 2-digit number so that the difference is 3.<br />3<br />
- 8. singaporemathinaction<br />+<br />Problem 5<br />Use one set of digit tiles to make a correct addition sentence.<br />
- 9. singaporemathinaction<br />+<br />Problem 6<br />Use one set of digit tiles to make a correct addition sentence.<br />
- 10. singaporemathinaction<br />x<br />Problem 7<br />Use one set of digit tiles to make a correct multiplication sentence.<br />
- 11. Solutions from Participants<br />45 x 2 = 90 <br />18 x 2 = 36 <br />16 x 3 = 48 <br />43 x 2 = 86<br />13 x 4 = 52<br />17 x 2 = 34<br />14 x 5 = 70<br />26 x 3 = 78<br />15 x 6= 90<br />29 x 3 = 87<br />34 x 2 = 68<br />12 x 5 = 60<br />13 x 6 =78<br />35 x 2 = 70<br />48 x 2 = 96<br />16 x 5 = 80<br />12x 8 = 96<br />15 x 4 = 60<br />19 x 2= 38<br />27 x 3 = 81<br />15 x 2 = 30<br />17 x 4 = 68<br />12 x 7 = 84<br />19 x 3 = 57<br />Why are there so few odd products?<br />
- 12. Shaping MathsCoursebook 4A<br />
- 13. singaporemathinaction<br />614<br />Two Numbers<br />2 units 614<br />4 units 1228<br />The sum of the two numbers is 1228.<br />Shaping MathsCoursebook 4A<br />
- 14. singaporemathinaction<br />boys<br />342<br />50<br />girls<br />Boys & Girls<br />2 units 342 – 50 = 292<br />1 unit 292 ÷ 2 = 140 + 6 = 146<br />There are 146 Primary Four boys.<br />Shaping MathsCoursebook 4A<br />
- 15. singaporemathinaction<br />Ravi<br />1775 + 85<br />Samuel<br />Stamps<br />After<br />1 unit 1860 ÷ 4 = 465<br />At first, Samuel had 465 – 85 = 380 stamps.<br />Shaping MathsCoursebook 4A<br />
- 16. 1860<br />1600<br />260<br />240<br />20<br />Keys Grade School, Manila<br />
- 17. singaporemathinaction<br />George Polya’s<br />Problem-Solving Model<br /><ul><li> Understand
- 18. Plan
- 19. Do
- 20. Look Back</li></li></ul><li>singaporemathinaction<br />Can you recall each of the four problem-solving phases when we were solving the problems in the last hour or so?<br />Think!<br />
- 21. singaporemathinaction<br />What are some of the methods used to solve the problems? Make a list of heuristics used.<br />Heuristics<br />

No public clipboards found for this slide

Be the first to comment