3.OA.D.8
Solve two-step problems, write an equation with a letter for the unknown, and check the answer is sensible.
Worksheets for this standard 2 topics
The standard, officially
Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.* *This standard is limited to problems posed with whole numbers and having wholenumber answers; students should know how to perform operations in the conventional order when there are no parentheses to specify a particular order (Order of Operations).