Adding and Subtracting Using Properties . Students are asked to complete addition and subtraction problems that can be done more easily by using properties.
Fluently add and subtract within 1000 using strategies and algorithms based on place value Solve two-step word problems using the four operations. (e.g., 9 × 80, 5 × 60) using strategies based on place value and properties of operations.
Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between Problems are chosen so that at first the tens digit is close to a multiple of.