Respuesta:
1) 4.-1-4:1-4 --2-8:- 4 +4
[tex]4.-1-4:1-4 --2-8:- 4 +4\\41-\frac{4}{1}-4-\left(-2\right)-\frac{8}{-4}+4\\\\=41-\frac{4}{1}-4+2-\frac{8}{-4}+4\\\\=43-\frac{4}{1}+\frac{8}{4}\\\\=43-4+2\\=41\\[/tex]
2) 9-1-6.-2-4. - 4+21:4-1-2
[tex]9-1-6.-2-4. - 4+21:4-1-2\\=9-1-62-4-4+\frac{21}{4}-1-2\\\\=-\frac{239}{4}[/tex]
3) - 25.-21:25+3 2:(-2)
[tex]- 25.-21:25+3 2:(-2)\\=\frac{-2521}{25}+32\div \left(-2\right)\\\\=\frac{-2521}{25}-16\\\\=-\frac{2921}{25}[/tex]
4) 36:1-2):3+27.-21:1-18:2
[tex]36:1-2):3+27.-21:1-18:2\\\\=36-\frac{2}{3}+2721-9\\\\=2747\frac{1}{3}[/tex]
5) 9:1-3:1-1 +(-2-1):8:1-4 +4
[tex]9:1-3:1-1 +(-2-1):8:1-4 +4\\\\=9\div \:1-3\div \:1-1-3\div \:8\div \:1-4+4\\=9-3-1-3\div \:8\div \:1-4+4\\\\=9-3-1-\frac{3}{8}-4+4\\\\=4\frac{5}{8}[/tex]
6) 9.-1+4.-2-5.-2-4:2+1-7
[tex]9.-1+4.-2-5.-2-4:2+1-7\\=91+42-52-2+1-7\\=73[/tex]
7) -3-3:1-3+8-1-5+7):1-8
[tex]-3-3:1-3+8-1-5+7):1-8\\=-3-3-3+8-1-5+7\div \:1-8\\=-3-3-3+8-1-5+7-8\\=-8[/tex]
8) 12.-3:9.15.-1:1-3
[tex]12.-3:9.15.-1:1-3\\=13.44115\dots \div \:1-3\\=13.44115\dots -3\\=10.44115\dots[/tex]
9) -6.-2-1+41:(-6)-11.4.-2 +2
[tex]-6.-2-1+41:(-6)-11.4.-2 +2\\=\frac{-22}{-15.42}\\\\=\frac{22}{15.42}\\\\=1.42671\dots[/tex]
10)25:1-5-5-4-3-3-6:-2-5-7
[tex]25:1-5-5-4-3-3-6:-2-5-7\\=25-32+3\\=-4[/tex]
