standard_description: Solve word problems involving addition and subtraction of fractions referring to the same whole, including cases of unlike denominators, e.g., by using visual fraction models or equations to represent the problem. Use benchmark fractions and number sense of fractions to estimate mentally and assess the reasonableness of answers. For example, recognize an incorrect result 2/5 + 1/2 = 3/7, by observing that 3/7 < 1/2.
problem_activity: Problem 1
Solve.
$${581\div27}$$
Problem 2
Plywood comes in sheets that are 32 square feet. A roofer needs 341 square feet of plywood for a job. How many sheets of plywood does the roofer need?


aligns: no