How can a problem that has 4 digits could have a sum that could have 5 digits

Match each equation with the operation you can use to solve for the variable. subtract 10. divide by 10. divide by 5. subtract 18. multiply by 10. add 18. add 10. multiply by 5. 5 = 10p arrowright p + 10 = 18 arrowright p + 18 = 5 arrowright 5p = 10 arrowright

Find the quotient. 50a2 – 98b2 -5a +7b

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.