standard_description: Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.
problem_activity: Round each of the following numbers to the nearest ten. Show or explain your thinking.
a.
$$46 \approx$$
__________
b.
$$24 \approx$$
__________


aligns: no