1.
1 вариант
(3/4)^2+0.8*3 1/8= 9/16+4/5 * 25/8= 9/16+5/2=(9+40)/16=49/16=3 1/16
2 вариант
0,4*4 3/8 - (1/4)^2= 2/5 * 35/8 - 1/16= (28-1)/16= 27/16= 1 11/16
2.
а) 2\9*3\8 = 1/12;
б)3\7*21= 9/1 = 9;
в)3 1\5*15\24 = 12/6 = 2;
г) 5\7*14/25 = 2/5 = 0,4;
д)3\5*15 = 9/1 = 9;
е)2 1\4*8\15 = 6/5 = 1,2
1.
1 вариант
(3/4)^2+0.8*3 1/8= 9/16+4/5 * 25/8= 9/16+5/2=(9+40)/16=49/16=3 1/16
2 вариант
0,4*4 3/8 - (1/4)^2= 2/5 * 35/8 - 1/16= (28-1)/16= 27/16= 1 11/16
2.
а) 2\9*3\8 = 1/12;
б)3\7*21= 9/1 = 9;
в)3 1\5*15\24 = 12/6 = 2;
г) 5\7*14/25 = 2/5 = 0,4;
д)3\5*15 = 9/1 = 9;
е)2 1\4*8\15 = 6/5 = 1,2