Lesson 4

Addition

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
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TIMS Challenge

This challenge can serve as a Problem of the Week.

  1. Counting by 2s, 3s, 4s, then 5s; The third row has multiples of 3, etc.
  2. First diagonal column moving down to the left is counting by ones, second column starts with 4 and counts on by twos, etc. The last or rightmost diagonal column moving down from left to right is made up of square numbers. Students may see other patterns.
  3. 6, 12, 18, 24, 30, 36
  4. 10 numbers in the tenth row. The first row has 1 number (1), the second row has 2 numbers (2 and 4), the third row has 3 numbers (3, 6, and 9), and so on. To continue the pattern, the tenth row will have 10 numbers, the multiples of 10 up to 10 × 10 (100).
  5. 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
  6. They are the square numbers; 36, 49, 64, 81.

N. Pattern Triangle

Look at the triangle and answer the following questions. Write your answers on a separate sheet of paper.

  1. Describe any patterns in the rows (across).
  2. Do the diagonal columns show any patterns? If so, describe the patterns going from upper right to bottom left and those going from upper left to bottom right.
  3. Complete the last row of the triangle.

  4. How many numbers will there be across the tenth row? How do you know?
  5. Write the numbers in the tenth row.
  6. What do you notice about the diagonal starting at 1 and going down the right side? Write the next 4 numbers in this diagonal.