standard_description: Create equations in two or more variables to represent relationships between quantities; graph equations on coordinate axes with labels and scales.
problem_activity: Problem 1
Randomly select a digit 0–9 (by using a ten-sided die, a spinner, or a random number generator). Whatever number it lands on, enter the digit in one of the eight spots below. After eight turns, the board becomes an addition problem with two 4-digit numbers to add together. The goal is to place the numbers in strategic places to get the highest sum without going over 10,000.
[IMG]
Problem 2
Estimate. Then solve.
a.
$$\begin{align} 207,426 \\ {+ \ 128,744}& \\ \hline \end{align}$$
b.   252, 393 =
$$\square$$
− 747,607
c.
$$k$$
= 94,989 + 619,732 + 4,506
Problem 3
Tom Brady has 66,159 career passing yards. Peyton Manning, the all-time leading quarterback with the most career passing yards, has 5,781 more passing yards than Tom Brady does. How many passing yards does Peyton Manning have?


aligns: no