làm đc phần nào thì làm nhá Question làm đc phần nào thì làm nhá in progress 0 Môn Toán Nem 3 years 2021-04-25T22:26:57+00:00 2021-04-25T22:26:57+00:00 2 Answers 18 views 0
Answers ( )
a) `5/-11 . 22`
`= 110/-11`
`=-10`
b) `(-3/5)^2`
`= (-3)^2/5^2`
`= 9/25`
c) `-4/9 . 3/-8`
`= -12/-72`
`=1/6`
d) `(1-8). (-4/7)`
`= -7 . (-4/7)`
`= 4`
e) `-5/8 . 16/25 -21/35`
`= -2/5 – 21/35`
`= -1`
f) `-12/11 . 33/72 – 26/65`
`= -1/2 – 26/65`
`=-9/10`
g) `8/15 . 3/64 – 13/25`
`= 1/40-13/25`
`=-99/200`
h) `( 1- 5/1) (3/8 – 5^2/24)`
`= -4 . (3/8 – 25/24)`
`= -4. (-2/3)`
`= 8/3`
`Bài` `1:`
`a,` `\frac{5}{-11}.22=“\frac{5.22}{-11}=“\frac{110}{-11}=-10`
`b,` `(\frac{-3}{5})^2=` `\frac{-3}{5}“.` `\frac{-3}{5}=“\frac{(-3)(-3)}{5.5}=` `\frac{9}{25}`
`c` `\frac{-4}{9}.“\frac{3}{-8}=“\frac{(-4).3}{9.(-8)}=“\frac{-12}{-72}=“\frac{12}{72}=“\frac{1}{6}`
`d,` `(1-8)` `.` `\frac{-4}{7}=` `-7` `.` `\frac{-4}{7}` `=` `\frac{28}{7}=4`
`e,f,g,h` `làm` `tương` `tự`