1390.
9 2 9 4 5 1
ա) 8 __ – 6 __= (8-6)+(__ – __)=2 _ = 2 __
10 5 10 10 10 2
5 3 5 3 2
բ) 4 __ – 2 __ = (4-2) +(__ – __ )=2 __
11 10 11 10 10
25
գ) 12 __ – 9 __
36