\(\frac{131.145+100}{45-132.145}=\frac{131.145+100}{45-145-131.145}=\frac{131.145+100}{-100-131.145}=\frac{131.145+100}{-\left(131.145+100\right)}=-1\)

\(M=\frac{131.145+100}{45-132.145}\)

\(=\frac{131-\frac{100}{145}}{\frac{45}{145}-132}\)

\(=\frac{131-\frac{20}{29}}{\frac{9}{29}-132}\)

\(=\frac{131\frac{-20}{29}}{-132\frac{9}{29}}\)

\(\frac{131.145+100}{45-132.140}=\frac{132.145-45}{45-132.140}=-1\)

\(\frac{49^6.5-7^{11}}{\left(-7\right)^{10}.5+2.49^5}=\frac{7^{11}.7-7^{11}.1}{7^{10}.5+2.7^{10}}=\frac{7^{11}.\left(7-1\right)}{7^{10}.\left(5+2\right)}=\frac{7^{11}.6}{7^{11}}=6\)

45/60 =3/4

15/36 = 5/12

105/75 = 7/5

72/100 = 18/25

45/60 = 3/4

15/36 = 5/12

105/75 = 7/5

72/100 = 18/25

45/60=3/4
15/36=5/12
105/75=7/5
72/100=18/25

\(\dfrac{24}{32}=\dfrac{24:8}{32:8}=\dfrac{3}{4}\)

\(\dfrac{45}{6}=\dfrac{45:3}{6:3}=\dfrac{15}{2}\)

\(\dfrac{75}{100}=\dfrac{75:25}{100:25}=\dfrac{3}{4}\)

\(\dfrac{27}{63}=\dfrac{27:9}{63:9}=\dfrac{3}{7}\)