Warm up with a Mystery Math Mistake to find the error in DC's addition. Use different strategies to subtract including counting back and the connection between addition and subtraction. Use a number line to help count on to find a difference.

Warm up with a Mystery Math Mistake to find the mistake made in counting up on a number line to subtract. Notice and wonder to compare a bar graph and a line plot. Measure your own hand span. Create and use a line plot of hand span data to answer questions.

Warm up with a Mystery Math Mistake to hunt for the mistake made counting up on the number line. Use place value cards to practice rounding numbers to the nearest ten and hundred.