Выполни действия.
7 + 4 = __
19 − 9 = __
5 + 8 = __
13 − 6 = _
12 − 6 = _
16 − 7 = _
(6 + 3) + 7 = __
(17 − 7) + 8 =__
(19 − 10) − 4 = _
7 + 4 = 11
19 − 9 = 10
5 + 8 = 13
13 − 6 = 7
12 − 6 = 6
16 − 7 = 9
(6 + 3) + 7 = 16
(17 − 7) + 8 = 18
(19 − 10) − 4 = 5