MENTAL MATH/NUMBER TALK TASK CARDS: Years 1-3 Looking for ways to increase your students' number sense, math fact recall, computation skills, problem-solving and fluency? Here it is. These mental math task cards are ideal for supporting the daily review of mental math problems in your classroom, significantly increasing students’ automaticity with math facts and problem-solving. They are differentiated and include addition and subtraction problems to 20 & 50 in two and three steps, along with