17 ÷ <span>(4 1/3 - 3 1/5) = 15
1)</span>4 1/3 - 3 1/5 = 13/3 - 16/5 =(13 × 5 - 16 × 3)/15 = 65/15 - 48/15 = 17/15 = 1 2/15
2)17 ÷ 1 2/15 = 17 ÷ 17/15 = 17 × 15/17 = 15
(15 - 4 1/8) ×<span> (3 14/15 - 2 3/5) =14 1/2
1)</span>15 - 4 1/8 = 15/1 - 33/8 =(15 × 8 - 33 × 1)/8 = 120/8 - 33/8 = 87/8 = 10 7/8
2)3 14/15 - 2 3/5 = 59/15 - 13/5 = (59 × 1 - 13 × 3)/15 = 59/15 - 39/15 = 20/15 = 4/3 = 1 1/3
3)10 7/8 × 1 1/3 = 87/8 × 4/3 = 29/2 = 14 1/2
Ответ: 3целых 9/56 и 5целых 27/55
Пошаговое объяснение:
4целых 2/7 - х = 1целая 1/8
х = 4целых 2/7 - 1целая 1/8
х = 4целых 16/56 - 1целая 7/56
х = 3целых 9/56
х - 2целых 2/5 = 3целых 1/11
х = 3целых 1/11 + 2целых 2/5
х = 3целых 5/55 + 2целых 22/55
х = 5целых 27/55
<span>d:14+706=1002
d:14=1002-706
d:14=296
d=296*14
d=4144
4144:14+706=1002
296+706=1002
1002=1002
</span>
(6 1/8 * 1 2/7 - 2 11/14 * 1 8/15) * 1 3/5=
= (49/8 * 9/7 - 39/14 * 23/15) * 8/5=
= ( 63/8 - 299/70) * 8/5 =
= (2205/280 - 1196/280) *8/5 =
= 1009/280 *8/5 = 1009/175 = 5 134/175
по действиям
1) 6 1/8 * 1 2/7 = 49/8 * 9/7 = (7*9)/(8*1) =63/8= 7 7/8
2) 2 11/14 * 1 8/15 = 39/14 * 23/15 =
=(13*23)/(14*5) = 299/70=4 19/70
3) 7 7/8 - 4 19/70 = 63/8 - 299/70 =
=2205/280 - 1196/280 = 1009/280= 3 169/280
4) 3 169/280 * 1 3/5 = 1009/280 * 8/5=
=(1009*1) / (35*5) = 1009/175 = 5 134/175
