1. What is $(999-99+9) \div 9$ ?
A 91
B 99
C 100
D 101
E 109
Solution
D We can calculate the value in more than one way.
One method is to first work out the value of the expression in the brackets and then divide the result by 9 . This gives
$$
(999-99+9) \div 9=909 \div 9=101 \text {. }
$$

Alternatively, we can first divide each number in the bracket by 9 and then evaluate the resulting expression. This gives
$$
(999-99+9) \div 9=(111-11+1)=101 \text {. }
$$

Of course, both methods give the same answer.