Question

a186b
(12) 13 - 2 =
(13) 13 - 3 =
(14) 13 - 7 =
(15) 13 - 8 =
(16) 13 - 5 =
(17) 14 - 2 =
(18) 14 - 3 =
(19) 14 - 7 =
(20) 14 - 5 =
(21) 14 - 8 =
(22) 14 - 9 =

Explanation:

(12)

Step1: Subtract 2 from 13

$13 - 2 = 11$

Step1: Subtract 3 from 13

$13 - 3 = 10$

Step1: Subtract 7 from 13

$13 - 7 = 6$

Answer:

11

(13)