C=75%+1,1:(2/5- 1 và 1/2)-(1/3)^2
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HH
4
TC
11 tháng 5 2022
\(=\dfrac{3}{4}+\dfrac{11}{10}:\left(\dfrac{2}{5}-\dfrac{3}{2}\right)-\dfrac{1}{9}\)
\(=\dfrac{3}{4}+\dfrac{11}{10}:-\dfrac{11}{10}-\dfrac{1}{9}=\dfrac{3}{4}+\left(-1\right)-\dfrac{1}{9}=\dfrac{27}{36}-\dfrac{36}{36}-\dfrac{4}{36}=-\dfrac{13}{36}\)
NG
4
22 tháng 8 2020
\(=\frac{3}{4}+\frac{11}{10}:\left(\frac{2}{5}-\frac{3}{2}\right)-\frac{1}{9}\)
\(=\frac{3}{4}+\frac{11}{10}:-\frac{11}{10}-\frac{1}{9}\)
\(=\frac{3}{4}+-1-\frac{1}{9}\)
\(=-\frac{1}{4}-\frac{1}{9}\)
\(=-\frac{13}{36}\)
VP
1
BT
20 tháng 3 2018
\(75\%+1,1:\left(\frac{2}{5}-1\frac{1}{2}\right)-\left(\frac{1}{3}\right)^2=\frac{3}{4}+1,1:\left(\frac{2}{5}-\frac{3}{2}\right)-\frac{1}{9}=\frac{3}{4}+1,1:\left(-\frac{11}{10}\right)-\frac{1}{9}=\)
\(=\frac{3}{4}-1,1:1,1-\frac{1}{9}=\frac{3}{4}-1-\frac{1}{9}=-\frac{13}{36}\)
16 tháng 3 2020
\(75\%+1,1:\left(\frac{2}{5}-1\frac{1}{2}\right)-\left(\frac{1}{3}\right)^2\)
\(=\frac{3}{4}+\frac{11}{10}:\left(\frac{2}{5}-\frac{3}{2}\right)-\frac{1}{9}\)
=\(\frac{3}{4}+\frac{11}{10}:\frac{-11}{10}-\frac{1}{9}\)
\(=\frac{3}{4}+\left(-1\right)-\frac{1}{9}\)
\(=\frac{27}{36}+\left(\frac{-36}{36}\right)-\frac{4}{36}\)
\(=\frac{-13}{36}\)
chúc bạn học tốt
26 tháng 2 2023
a: =3/8-1/4
=3/8-2/8
=1/8
b: =-5/9+3/5-1/9+2/5
=-2/3+1
=1/3
c: =21/7*5/25=3/5
d: =3/4+11/10:(2/5-3/2)-1/9
=-13/36
C
8 tháng 3 2023
`a)1 4/23 + ( 5/21-4/23)+16/21-1/2`
`=27/23+5/21-4/23+16/21-1/2`
`=(27/23-4/23)+(5/21+16/21)-1/2`
`=23/23+21/21-1/2`
`=1+1-1/2`
`=2-1/2`
`=4/2-1/2`
`=3/2`
___
`b)75%-(5/2+5/3)+(-1/2)^3`
`=3/4-5/2+5/3+(-1/8)`
`=(3/4-5/2-1/8)+5/3`
`=(6/8-20/8-1/8)+5/3`
`=-15/8+5/3`
`=-45/24+40/24`
`=-5/24`
___
`c)-3/4(-55/9).8/11`
`=-3/4.(-40/9)`
`=-10/3`
__
`d)-3/8 . 6/13 + 7/13 . (-3/8) + 1 3/8`
`= -3/8 . (6/13 + 7/13) + 11/8`
`= -3/8 . 13/13 + 11/8`
`= -3/8 .1 + 11/8`
`= -3/8 + 11/8`
`= 8/8`
`=1`
3 tháng 6 2021
Giải:
a) \(\left(9\dfrac{4}{9}+5\dfrac{2}{3}\right)-5\dfrac{1}{2}\)
\(=\left(\dfrac{85}{9}+\dfrac{17}{3}\right)-\dfrac{11}{2}\)
\(=\dfrac{136}{9}-\dfrac{11}{2}\)
\(=\dfrac{173}{18}\)
b) \(\dfrac{13}{9}.\dfrac{15}{4}-\dfrac{13}{9}.\dfrac{7}{4}-\dfrac{13}{9}.\dfrac{5}{4}\)
\(=\dfrac{13}{9}.\left(\dfrac{15}{4}-\dfrac{7}{4}-\dfrac{5}{4}\right)\)
\(=\dfrac{13}{9}.\dfrac{3}{4}\)
\(=\dfrac{13}{12}\)
c) \(\dfrac{2}{3}+\dfrac{5}{8}-\dfrac{-1}{3}+0,375\)
\(=\left(\dfrac{2}{3}-\dfrac{-1}{3}\right)+\left(\dfrac{5}{8}+\dfrac{3}{8}\right)\)
\(=1+1\)
\(=2\)
d) \(75\%-3\dfrac{1}{2}+1,5:\dfrac{10}{7}\)
\(=\dfrac{3}{4}+\dfrac{7}{2}+\dfrac{3}{2}:\dfrac{10}{7}\)
\(=\dfrac{3}{4}+\dfrac{7}{2}+\dfrac{21}{20}\)
\(=\dfrac{53}{10}\)
e) \(1\dfrac{13}{15}.\left(0,5\right)^2.3+\left(\dfrac{8}{15}-1\dfrac{19}{60}\right):1\dfrac{23}{24}\)
\(=\dfrac{28}{15}.\dfrac{1}{4}.3+\left(\dfrac{8}{15}-\dfrac{79}{60}\right):\dfrac{47}{24}\)
\(=\dfrac{7}{5}+\dfrac{-47}{60}:\dfrac{47}{24}\)
\(=\dfrac{7}{5}+\dfrac{-2}{5}\)
\(=1\)
Đáp án: =−1336
Giải thích các bước giải:
75%+1,1:(25−112)−(13)2
=75/100+1,1:(25−32)−1/9
=3/4+1,1:−1110−1/9
=3/4−1−1\9
=−1/4−1/9
=−13/36
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