1. 2.3 Ruler problems and number lines Objective: To solve ruler problems

2. Ruler Rules to live by: Look at Example #1 1.Find Length 50-20=3 2.Divide Length into big blocks 30/3=10 3.Give # for Big lines 4.Divide Big Blocks into little spaces 10/5=2

3. Example 1: 22222 10 20 50 1.Find length 50-20=3 2. Divide length into big blocks 30  3=10 3. Give # for big lines 4. Divide big blocks into little space 10  5  2

4. Example# 2: 15 60 33333 60-15=45 45  3  15 15  5  3

5. Ex 3: 20 44444 100 120140160 180 180  100  80 80  4=20 20  5  4  10 35 35-10  45 45  3  15 15  5  3