A) 6 1 · 1 2 = 49 · 9 = 63 = 7 7
8 7 8 · 7 8 8
Б)( 2,4:5)·1+22 · 1 2 = 24 · 1 · 1 + 22 · 13 =12 · 1 + 13 =
3 10 11 10 · 5 3 10 · 11 25 · 3 5
= 4 + 13 = 4 + 65 =69 = 2 19
25 5 25 25 25
В)3 1 ·4 - 5 1 : 3 2 = 25 · 4 - 11· 3 = 25 - 3 = 25 - 6 = 19 = 4 3
8 2 3 8 ·1 2 ·11 4 2 4 4 4