### 12 - Two step word problems

Define Principle

Sum and Difference can help you solve word problems that describe real life questions

Discovery

On the Home Campus Website, review the Learn page for Lesson 1.11  (adding and subtracting problems only)   http://my.homecampus.com.sg/Primary_Grade_3_Mathematics

Learn about Thinking Blocks and practice some Thinking Block word problems on this website:
http://www.mathplayground.com/thinkingblocks.html

Thinking Blocks will be used to solve story problems for the next several years.  Practice several problems now to help you understand how thinking blocks are used.

Video Presentations on Thinking Blocks:

Skill Practice

On the Home Campus Website, practice the problems on the Practice and Worksheet pages for Lesson 1.11   (adding and subtracting problems only)    http://my.homecampus.com.sg/Primary_Grade_3_Mathematics

On your own, solve the problems on page 20-21 of your Singapore 3A textbook.  See video presentations below if you need help solving the problems.

Evaluate and Apply

Singapore 3A:  Practice 2A
Singapore 3A:  Practice 2B

Share

Write your own word problem and show how you can use thinking blocks, sum and difference to solve the problem.

More Video Presentations:
 Video Presentation from Kahn Academy.  Working examples from page 20 of Singapore 3A http://youtu.be/3ybPmFWZXwkVideo Presentation from Kahn Academy.  Working examples from page 20 of Singapore 3A  http://youtu.be/GVVOqaIdxp8Video Presentation from Kahn Academy.  Working examples from page 21 of Singapore 3A  http://youtu.be/Awx6eoc_XYU