Question

David is trying to find which number belongs in the parentheses

(?)⋅9=2106

Which calculation should David perform to find the missing number?

Add 9 to both sides of the equation.

Subtract 9 from both sides of the equation.

Multiply both sides of the equation by 9.

Divide both sides of the equation by 9.

Answer 1

David should divide both sides of the equation by 9 to find the missing number. This will give him the value of the number that belongs in the parentheses.