3 : 7 =  3 7 ;  4∶9 =  4 9 ; 23∶6 =  23 6

25 : 100 =  25 100 ; 100∶33 =  100 33 ; 10∶31 =  10 31

\(\dfrac{18}{6}=18:6=3;\dfrac{72}{9}=72:9=8;\dfrac{42}{7}=42:7=6\\ \dfrac{99}{11}=99:11=9;\dfrac{115}{23}=115:23=5;\dfrac{100}{25}=100:25=4\)

Rồi mình tích cho

\(\dfrac{18}{6}=18:6=3;\dfrac{72}{9}=72:9=8\\ ;\dfrac{42}{7}=42:7=6;\dfrac{99}{11}=99:11=9;\\ \dfrac{115}{23}=115:23=57,5;\dfrac{100}{25}=100:25=4\)

a: \(1\dfrac{9}{10}=1,9\)

\(2\dfrac{66}{100}=2,66\)

\(3\dfrac{72}{100}=3,72\)

\(4\dfrac{999}{1000}=4,999\)

b: \(8\dfrac{2}{10}=8,2\)

\(36\dfrac{23}{100}=36,23\)

\(54\dfrac{7}{100}=54,07\)

\(12\dfrac{254}{1000}=12,254\)

`8: 15=8/15`

`7:3=7/3`

`45:100=45/100=9/20`

`11:26=11/26`

\(8:15=\dfrac{8}{15}\)

\(7:3=\dfrac{7}{3}\)

\(45:100=\dfrac{45}{100}=\dfrac{9}{20}\)

\(11:26=\dfrac{11}{26}\)

C

C

c

6,25

6.25

6,25

B

B

b