Swun Math Un 2 L4

Explain the relationship between the two expressions? Prove your answer.
Sara bought 5 pink hula hoops and 7 yellow hula hoops. Each hula hoop cost $1.25. How much money did Sara spend?

Betty baked 36 cupcakes. She gave 2 cupcakes to each of her 7 family members. How many cupcakes does Betty have left?

What is the relationship between the two expressions? Prove your answer.
What is the relationship between the two expressions? Prove your
answer.
Bartolo had 4 pencil boxes with 5 new pencils in each. His teacher gave him 3 more pencils. How many pencils does Bartolo have in all? Write and evaluate the expression.