Answer:
we don't need to put parenthesis to the expression:
(21+21) ÷ 7
Step-by-step explanation:
The expression (21+21)÷7 is already equivalent to 6 because to solve the equation, we first need to make the sum and then the division:
(21+21) ÷ 7
42 ÷ 7
6
Therefore, we don't need to put parenthesis to the expression:
(21+21) ÷ 7