\(\dfrac{3}{5}.\dfrac{13}{46}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(=3.\dfrac{1}{5}.\dfrac{1}{2}.\dfrac{13}{23}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(=3.\dfrac{1}{10}.\dfrac{13}{23}-\dfrac{1}{10}.\dfrac{16}{23}\)

\(=\dfrac{1}{10}.\left(3.\dfrac{13}{23}-\dfrac{16}{23}\right)\)

\(=\dfrac{1}{10}.1=\dfrac{1}{10}\)

Chúc bạn học tốt!!!

3/5 . 13/46 - 1/10 . 16/23 = 3 . 1/5 . 1/2 . 13/23 - 1/10 . 16/23

= 1/10 . 39/23 - 1/10 . 16/23

= 1/10 . (39/23 - 16/23)

= 1/10

Xong rồi đó ^ ^!

\(\frac{3}{5}.\frac{13}{46}-\frac{1}{10}.\frac{16}{23}\)

= \(\frac{39}{230}-\frac{8}{115}\)

= \(\frac{1}{10}\)

\(\frac{1}{10}\) nha bạn

a. 137-(-23)=137+23=160

b.\(3^3.75+25.3^3-34=3^3.\left(25+75\right)-34=27.100-34=2700-34=2666\)

\(\frac{3}{5}.\frac{13}{46}+\frac{1}{10}.\frac{16}{23}=\frac{39}{230}+\frac{1}{10}.\frac{16}{23}=\frac{39}{230}+\frac{8}{115}=\frac{11}{46} \)

học tốt

Tính

3 .1/5.1/2.13/23 + 1/0.16/23

3.1/10.13/23 + 1/10 . 16/23

1/10 . {3.13/23 + 16/23}

toi day ban tu tinh

\(\frac{3}{5}.\frac{13}{46}-\frac{1}{10}.\frac{16}{23}\)

\(=\frac{3}{5}.\left(\frac{1}{46}.13\right)-\frac{1}{10}.\frac{32}{46}\)

\(=\left(\frac{3}{5}.13\right).\frac{1}{46}-\left(\frac{1}{10}.32\right).\frac{1}{46}\)

\(=\frac{39}{5}.\frac{1}{46}-\frac{32}{10}.\frac{1}{46}\)

\(=\frac{78}{10}.\frac{1}{46}-\frac{32}{10}.\frac{1}{46}\)

\(=\left(\frac{78}{10}-\frac{32}{10}\right).\frac{1}{46}\)

\(=\frac{46}{10}.\frac{1}{46}\)

\(=\frac{1}{10}\)

a)29 . (19 – 13) – 19 . (29 – 13)

= 29 . 6 – 19 . 16

= 174 – 304

= –130.

b)31.(-18)+31.(-81)-31       

= 31. [-18 + (-81) - 1 ]

= 31. (-100)

= -3100

c)(7.3-3):(-6)  

(7.3-3):(-6)

= (21-3):(-6)

= 18 : (-6)

= 3

d)72:[(-6).2+4)]       

= 72 : ( -12 + 4 )

= 72 : -8

= -9

Bài 2:

a)(-12).47+(-12).52+(-12)       

= (-12).(47+52+1)

= -1200

b)13.(23+22)-3.(17+28)  

13 . (23 + 22) - 3 . (17 + 28)

= 13 . 45 - 3 . 45

= ( 13 - 3 ) . 45

= 10 . 45

= 450

c)18-10:(-2)-7   

= 18-5+7

= 13+7

= 20

d)99:[(-7).2+5)