1. Unit 1, Lesson 4 Line Math Puzzles We are going to learn to solve line math puzzles and then you will create your own.

2. Goals Develop mathematical reasoning Practice addition facts

3. Teaching the Activity This line math puzzle is made of boxes connected with lines What is the sum of each line? What pattern do you see? What number is in all three sums? What other patterns do you see?

4. Line math puzzles Each line of boxes connected by a dotted line in a line math puzzle has the same sum Arrange the numbers on the Line Math Puzzles 1 and Line Math Puzzles 2 activity pages so that each line has the specified sum. Write the number sentences on the side of the page next to the puzzles

5. Extension Make your own design for the line and box structures of the puzzle Create line math puzzles based on a new rule: Every line has a different sum Use 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20 to do a line math puzzle