а) 3/20 • 3 - 3/10 : 2 = 3/20 • 3 - 3/10 • 1/2 = 9/20 - 3/20 = 6/20 = 3/10
б) 1/18 • 7 + 5/6 : 3 = 1/18 • 7 + 5/6 • 1/3 = 7/18 + 5/18 = 12/18 = 2/3
в) 5/11 : 2 + 21/22 : 3 = 5/11 • 1/2 + 21/22 • 1/3 = 5/22 + 7/22 = 12/22 = 6/11
г) 2/25 • 10 - 7/10 : 2 = 2/25 • 10 - 7/10 • 1/2 = 4/25 - 7/20 = 16/100 - 35/100 = -19/100
а) 3/20 • 3 - 3/10 : 2 = 3/20 • 3 - 3/10 • 1/2 = 9/20 - 3/20 = 6/20 = 3/10
б) 1/18 • 7 + 5/6 : 3 = 1/18 • 7 + 5/6 • 1/3 = 7/18 + 5/18 = 12/18 = 2/3
в) 5/11 : 2 + 21/22 : 3 = 5/11 • 1/2 + 21/22 • 1/3 = 5/22 + 7/22 = 12/22 = 6/11
г) 2/25 • 10 - 7/10 : 2 = 2/25 • 10 - 7/10 • 1/2 = 4/25 - 7/20 = 16/100 - 35/100 = -19/100