Numbers tell us how much or how many'

1

• Numbers tell us how much or how many.
• Counting tells how many things we have.
• It is easier to count things if we organize them.

Gr1-U1-L1
2

• The last number counted in the set tells us the
  number of things in the whole set.
• It is easier to count things if we organize them.
• Gr1-U1-L2

3

• When counting to 10, the order of the numbers is
  1, 2, 3, 4, 5, 6, 7, 8, 9, 10.
• Gr1-U1-L3

4

• When counting from 11 to 20, the order of the
  numbers is 11, 12, 13, 14, 15, 16, 17, 18, 19,
  20.
• Gr1-U1-L4

5

• A set is equal o another set if it has the same
  number of things in it.
• Two 5s make a 10 and two 10s make a 20.
• A set is greater than another set if it has more
  things in it.
• A set is less than another set if it has fewer
  things in it.
• Gr1-U1-L5

6

• Events or things can be placed in order.
• We can describe the order of events or things
  using the words first, last, before and after.
• Gr1-U1-L6

7

• Ordinal numbers are order numbers. These numbers
  tell us the position of things. For example,
  they tell us what comes first, second, third, and
  so on.
• Gr1-U1-L7

8

• Ordinal numbers tell us the position of things.
• Ordinal number words can be shortened. For
  example, first can be written as 1st, and so on.
• Gr1-U1-L8