4_5_07

Whole-class math:
> For example, 10+3+3+5, 10+5=15 is friendly and 3+3=6 is friendly and then you can add 15+6 to get 21.
 * Complete and talk about data from school lunch survey
 * Play a game of looking for friendly numbers in number strings: I write a number string on the board, students look for numbers that are easy to put together.
 * Make a list of friendly numbers:
 * doubles
 * plus-ones
 * tens
 * fives
 * plus-twos
 * doubles-plus-one