1. 17,15 : 3 1/2 + 14,86 - 6 4/5 = 2. (6,28 + 9 4/5) * 7,24 - 17 3/8 = 3. 10,125 : 3 3/4 +16,8 - 3 1/2 * 4,03 = 4. 6 7/10 * 4/9 + 8 3/15 - 17,008 =

1. 17,15 = 1715/100 = 17 15/100
14,86 = 1486/100 = 14 86/100
17 15/100 : 3 1/2 + 14 86/100 - 6 4/5
= 15 : 50 + 86 - 80 = 8,33 6,3/100

2. 6,28 = 628/100
7,24 = 724/100
( 628/100 + 49/5 ) × ( 724/100 - 139/8 ) =
( 1256/200+ 1960/200 ) × ( 1448 - 3475 ) =
3216/200 × -2027/200 =
- 6518832/200 = - 32594 32/200

3. 3 3/4 = 15/4 = 3,75
3 1/2 = 7/2 = 3,5
10,125 : 3,75 + 16,8 - 3,5 × 4,03 = 64,48

4. 6 7/10 = 67/10 = 6,7
4/9 = 0,4
8 3/15 = 123/15 = 8,2
6,7 × 0,4 + 8,2 - 17,008 = - 6,128


maaf klo slah..