1. = 1 7/12:(9/24+10/24) = 1 7/12:19/24 = 19/12*24/19 = 2
2. =17/36: ( 21/36-20/36 ) = 17/36:1/36 = 17/36*36/1 = 17
3. = ( 3/14+10/14):26/7 = 13/14:26/7 = 13/14*7/26 = 1/4
4. = 19/24:(9/48+10/48) = 19/24:19/48 = 19/24*48/19 = 2
(х-31+48)-(31-4)+(11-8+34)=48
х-31+48-31+4+11-8+34=48
х+27=48
х=48-27
х=21
В скобка№1 <span>(484+36)=510-180=330
</span>в скобка№2 <span>(36+164)=200 437-200=237</span>
52:2=26 пар ног
26-20=6 поросят
20-6=14 кур
Ответ: 6 поросят , 14 кур
73-58= 15
73
-
58
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15