Adding and Subtracting Decimals Introduction

What is the sum of 45.1 and 12.7?

What is the difference between 21.7 and 4.8?

Solve.

Solve.

Mariah and Whitney both opened up their piggy banks to see how much money they had.

Which expressions equal 12.55? Select ALL that apply.

Sandi has $1.30. She buys two items. She has no money left after her purchase. Click on the two items she bought.

Each of the students below were given an expression to solve. One of them did it incorrectly. Click on the student who made the error.

Use the table below to solve the problem.

Write an expression that represents the model below and find its solution. Explain your thinking.