Warm-up True or False: Sums within 20
Decide if each statement true or false. Be prepared to explain your reasoning.
Activity 1 Heads Up: Make 20
Partner A holds a card on their forehead without looking.
Partner B names the number that you can add to the number on the card to get 20.
Partner A says the number on their card.
Record an equation to represent how you found the unknown addend.
my partner’s equations
Activity 2 Number Mix Up
You are going to use your cards to complete number puzzles. You may only use numbers 0 through 9. You may only use each number one time to make all the equations true.