First - Number, money and measure
Standard 1.NS.1.1 - Practice estimating addition equations by first rounding the numbers then adding them together.
Included Skills: Estimation
Estimation and rounding • I can share ideas with others to develop ways of estimating the answer to a calculation or problem, work out the actual answer, then check my solution by comparing it with the estimate. • Uses strategies to estimate an answer to a calculation or problem, for example, doubling and rounding. • Rounds whole numbers to the nearest 10 and 100 and uses this routinely to estimate and check the reasonableness of a solution.