Prof. S. Brick Math 201
Fall ’02 Elem. Ed. Math I; Quiz 5 section 2
0. Print your name:
1. Show how to quickly compute 49 ×7. Explain what this technique is and why it works.
2. Solve |2−x|= 3. Show each of your steps.
3. Explain how you could add 7 + 8 + 4 + 3 + 6 + 2 + 9 quickly. Why does this work ?