NC.1.OA.1 Represent and solve addition and subtraction word problems, within 20, with unknowns, by using objects, drawings, and equations with a symbol for the unknown number to represent the problem,when solving: • Add to/Take from-Change Unknown • Put together/Take Apart-Addend Unknown • Compare-Difference Unknown There are four sheets total in this purchase. There is one for:- Add to/Take from- Change Unknown with four questions- Put together/Take Apart-Addend Unknown with four questions- Com