1.а)2,б)1,в)6
2.а)9/5,б)9/4,в)8/3
3.а)31/4,б)47/12,в)22/3.г)5-1/5
1) - 6 2/3 - 8,75 = - 20/3 - 8 3/4 = - 20/3 - 35/4 = - (80/12 + 105/12) = - 185/12 = - 15 5/12
2) - 3 7/15 + 0,4 - 6 1/3 = - 3 7/15 + 2/5 - 6 1/3 = - 52/15 + 2/5 - 19/3 = - 52/15 + 6/15 - 95/15 = - 1/15 * ( 52 - 6 + 95) = - 1/15 * 151 = - 151/15 = - 10 1/15
3)-1,5 - 3 4/5 - 8 3/20 = - 1 1/2 - 3 4/5 - 8 3/20 = - 3/2 - 19/5 - 163/20 = - 30/20 - 76/20 - 163/20 = - 1/20 * (30 + 76 + 163) = - 1/20 * 269 = - 269/20 = -13 9/20
4) - 2 5/8 - 9,25 - 3/4 = - 2,625 - 9,25 - 0,75 = - (2,625 + 9,25 + 0,75) = - 12,625 = 12 5/8
Пошаговое объяснение:
1.
a) = 2. 1/4
б) = 1. 7/8
в) = 6
2.
а) = 9/5
б) = 9/4
в) = 8/3
3.
а) = 7. 2/4 + 1/4 = 7. 3/4
б) = 3. 3/12 + 8/12 =
3. 11/12
в) = 2. 4/9 + 1. 3/9 =
3. 7/9
г) = 2. 3/10 + 3. 2/10 = 5. 5/10 = 5. 1/2