Решить
5/6 * 1 6/5 , 3 1/9 * 3/8 , 9 1/7 * 3/4 , 10 1/5 * 10/17 , 3/11 * 5 1/2
буду
265
373
Ответы на вопрос:
5/6 · 1 6/5 = 5/6 · 11/5 = 11/6 = 1 целая 5/6
3 1/9 · 3/8 = 28/9 · 3/8 = (7·1)/(3·2) = 7/6 = 1 целая 1/6
9 1/7 · 3/4 = 64/7 · 3/4 = (16·3)/(7·1) = 48/7 = 6 целых 6/7
10 1/5 · 10/17 = 51/5 · 10/17 = (3·2)/(1·1) = 6
3/11 · 5 1/2 = 3/11 · 11/2 = 3/2 = 1 целая 1/2
А). 2 1/2-3,4(12)-4/3+1/3*(1/2+0,5-3 1/2)= 5/2-34/10*12-4/3+1/3(1/2+1/2-7/2)=5/2-408/10-4/3+1/3(-5/2)=25/10-408/10-8/6-5/6=-433/10-13/6=-2165/30-65/30= 2230/30= -74 1/3≈-74,33 б). (0,(5)*0,(2)): (3 1/3: 33//5*1 1/3): 4/3=0,1: (10/3*25//5*4/3)*3/4= 1/10*99/250-2/5=99/2500-1000/2500= -901/2500 =-0,3604
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