standard_description: Add and subtract within 1000, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method. Understand that in adding or subtracting three-digit numbers, one adds or subtracts hundreds and hundreds, tens and tens, ones and ones; and sometimes it is necessary to compose or decompose tens or hundreds.
problem_activity: Problem 1
Solve. Show or explain your work.
a.
$$72\div6$$
b.
$$3,809\div5$$
Problem 2
Alyssa is using the area model below to solve a problem.
[IMG]
Write the problem represented by the whole area model, including its quotient and remainder.


aligns: no