Question

Do number 9 Nd 11 Nd 12 please .

Answer 1

9 would 12 because it’s basically asking what is 14-2 which is 12
11 would be 5 and the way you solve it is 13-8 which equals 5 then you would check your answer by doing 13-5 which equals 8
12 would one ten and 5 ones because the answer is 15