Look at the expression .
Choose a strategy and solve the expression.
Hint: You can use the vertical column method.
Check your answer using the inverse operation. Remember that inverse means the opposite.
Which addition expression shows the opposite calculation you need to carry out?
Sophia and Benjamin have been asked to solve .
Sophia solves it and gets an answer of 51.
Benjamin solves it and gets an answer of 31.
Who is correct? Use the vertical column method to find out.
Check your answer using the inverse operation.
What number do you add to 45 to get 96?