Let’s try to solve some new kinds of problems.

Let’s use tape diagrams to make sense of different kinds of stories.

Let’s see how equations can describe tape diagrams.

Let’s see how tape diagrams can help us answer questions about unknown amounts in stories.

Let’s see how a balanced hanger is like an equation and how moving its weights is like solving the equation.

Let’s use hangers to understand two different ways of solving equations with parentheses.

Let’s show that doing the same to each side works for negative numbers too.

Let’s think about which way is better when we solve equations with parentheses.

Let’s work with inequalities.

Let’s solve more complicated inequalities.

Let’s solve more complicated inequalities.

Let’s write inequalities.

Let's look at solutions to inequalities.

Let's find ways to work with subtraction in expressions.

Let's use the distributive property to write expressions in different ways.

Let's see how we can tell that expressions are equivalent.

Let’s see how to use properties correctly to write equivalent expressions.

• Let’s use expressions to solve problems.