We worked with subtraction today, and bringing -1 facts to fluency. We think one less from the whole number. Then we mixed up addition and subtraction problems we are working with for fluency. It was tricky at first to remember to check the sign to know if we were adding or subtracting. We all agreed we were really "on fire" and had to use our "fire extinguishers" to put each other out! We are having fun adding and subtracting!