Draw a number line from 1 to 10 on your piece of paper. 3. Get a deck of cards to practice the counting-back strategy. Draw two cards from the deck and subtract the two numbers of the cards using ...

Practice adding and subtracting within 20 using a Double 10-frame & number line. Represent a teen number ... a mystery math mistake and we'll add and subtract within 20. Let's warm up our math ...