standard_description: Understand the meaning of the equal sign, and determine if equations involving addition and subtraction are true or false. For example, which of the following equations are true and which are false? 6 = 6, 7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
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