standard_description: Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.
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