standard_description: Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
problem_activity: Problem 1
Solve.
a.
$$380\div10=$$
________
b.
$$4,820 \times \frac{1}{10}=$$
________
Problem 2
Explain what happened to the value of the 8 in both problems in #1.


aligns: no