48. 36. 12.
32. 24. 8.
64. 48. 16.
11часов 15 минут
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22.4=1.6-12.8
1.6x=22.4-12.8
x=9.6
<span>17:(3/5+1/4)+(7/8-1/4)*(4/5)^2=20 2/5
1. </span><span>3/5+1/4=12/20+5/20=17/20
2. 17:17/20=17*20/17=20
3. 7/8-1/4=7/8-2/8=5/8
4. (4/5)</span>²=16/25
5. 5/8*16/25=2/5
6. 20+2/5=20 2/5 или 20 4/10=20,4