Вроде должно быть правильно
(1/2)+(3/7)=(7/14)+(6/14)=13/14
(1/3)+(1/8)=(8/24)+(3/24)=11/24
(5/6)+(1/3)=(5/6)+(2/6)=7/6=1 1/6
(5/24)+(5/6)=(5/24)+(20/24)=25/24=1 1/24
(1/4)+(1/6)=(3/12)+(2/12)=5/12
(1/6)+(2/9)=(6/36)+(8/36)=14/36=7/18
1) Р = 3/4 * 4 = 12/4 = 3 см
S = 3/4 * 3/4 = 9/16 кв.см
2) Р = 5/6 * 4 = 20/6 = 10/3 = 3 1/3 см
S= 5/6 * 5/6 = 25/36 кв.см
3) Р = 9/10 * 4 = 36/10 = 3 6/10 = 3 3/5 см
S =9/10 * 9/10 = 81/100 кв.см
4) Р = 1 2/3 * 4 = 5/3 * 4 = 20/3 = 6 2/3 см
S = 1 2/3 * 1 2/3 = 5/3 * 5/3 = 25/9 = 2 7/9 кв.см
1).1593÷27=59
2).59+326=385
3).385×60=23100
а) 8 : 5 = 1 (ост.3)
8 : 5 = 8/5 = 1 целая 3/5
61 : 10 = 6 (ост.1)
61 : 10 = 61/10 = 6 целых 1/10
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б) 10/3 = 10 : 3 = 3 (ост.1)
10/3 = 3 целых 1/3
97/40 = 97 : 40 = 2 (ост. 17)
97/40 = 2 целых 17/40