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a) 1032-[314-(314+32)]
= 1032-[314-346]
= 1032- (-32)
= 1064
b) 12-11+15-27+11
= 1+15-27+11
= 16 - 27 + 11
= (-11) + 11
= 0
`Answer:`
a. \(-\frac{17}{30}-\frac{11}{-15}+-\frac{7}{12}\)
\(=-\frac{17}{30}+\frac{11}{15}-\frac{7}{12}\)
\(=-\frac{17}{30}+\frac{22}{30}-\frac{7}{12}\)
\(=\frac{1}{6}-\frac{7}{12}\)
\(=-\frac{5}{12}\)
b. \(-\frac{5}{9}+\frac{5}{9}:\left(\frac{5}{3}-\frac{25}{12}\right)\)
\(=-\frac{5}{9}+\frac{5}{9}:\left(-\frac{5}{12}\right)\)
\(=\frac{5}{9}.\left(-1\right)+\frac{5}{9}.\left(-\frac{12}{5}\right)\)
\(=\frac{5}{9}.\left(-1-\frac{12}{5}\right)\)
\(=\frac{5}{9}.\frac{-17}{5}\)
\(=-\frac{17}{9}\)
c. \(-\frac{7}{25}.\frac{11}{13}+-\frac{7}{25}-\frac{2}{13}-\frac{18}{25}\)
\(=\frac{77}{325}-\left(\frac{7}{25}+\frac{18}{25}\right)-\frac{2}{13}\)
\(=\frac{77}{325}-1-\frac{2}{13}\)
\(=-\frac{452}{325}\)
a) 1032 - [ 314 - ( 314 + 32)]
= 1032 - [ 314 - 314 -32 ]
= 1032 - [ 0 - 32 ]
= 1032 - (-32)
= 1032 + 32 =1064
b) 12 - 11 + 15 - 27 + 11
= 12 + (-11) + 15 +(-27) +11
= [ 12 + 15 + (-27)] + [ (-11) + 11]
= 0 + 0 = 0
a) 1032 - [314 - (314 + 32)]
=1032 - 314 + (314 + 32)
=1032 - 314 +314 + 32
=1032 +32=1064
b)12 - 11 + 15 - 27 +11
=12- 27 - 11 +11 +15
= -15 - 0 + 15
= -15+15 +0=0+0=0
a: \(=\dfrac{15}{4}:\dfrac{2-7}{16}-\dfrac{5}{9}\cdot\left(\dfrac{3}{5}+\dfrac{4}{5}\right)\)
\(=\dfrac{15}{4}\cdot\dfrac{16}{-5}-\dfrac{5}{9}\cdot\dfrac{7}{5}\)
\(=\dfrac{-240}{20}-\dfrac{7}{9}=-12-\dfrac{7}{9}=\dfrac{-115}{9}\)
c: \(=\dfrac{1}{5}-\dfrac{7}{2}-\dfrac{3}{2}+\dfrac{5}{4}\)
\(=\dfrac{4+25}{20}-5=\dfrac{29}{20}-\dfrac{100}{20}=\dfrac{-71}{20}\)
d: \(=\dfrac{12}{17}\left(1-\dfrac{1}{15}-\dfrac{4}{5}+1\right)=\dfrac{12}{17}\cdot\dfrac{17}{15}=\dfrac{12}{15}=\dfrac{4}{5}\)
e: \(=\dfrac{2}{15}\cdot\dfrac{9}{8}-\dfrac{7}{4}\cdot\dfrac{9}{8}+\dfrac{25}{36}\)
\(=\dfrac{9}{8}\left(\dfrac{2}{15}-\dfrac{7}{4}\right)+\dfrac{25}{36}\)
\(=\dfrac{9}{8}\cdot\dfrac{8-105}{60}+\dfrac{25}{36}\)
\(=\dfrac{9}{8}\cdot\dfrac{-97}{60}+\dfrac{25}{36}=\dfrac{-1619}{1440}\)
Bài 1 :
\(a)\frac{-17}{30}-\frac{11}{-15}+\left(-\frac{7}{12}\right)\)
\(=\frac{1}{6}+\left(-\frac{7}{12}\right)\)
\(=-\frac{5}{12}\)
\(b)-\frac{5}{9}+\frac{5}{9}:\left(1\frac{2}{3}-2\frac{1}{12}\right)\)
\(=-\frac{5}{9}+\frac{5}{9}:\left(\frac{5}{3}-\frac{25}{12}\right)\)
\(=-\frac{5}{9}+\frac{5}{9}:\left(-\frac{5}{12}\right)\)
\(=-\frac{5}{9}+\left(-\frac{2}{3}\right)\)
\(=-\frac{1}{9}\)
\(c)-\frac{7}{25}\times\frac{11}{13}+\left(-\frac{7}{25}\right)\times\frac{2}{13}-\frac{18}{25}\)
\(=-\frac{77}{325}+\left(-\frac{14}{325}\right)-\frac{18}{25}\)
\(=-\frac{7}{25}-\frac{18}{25}\)
\(=-1\)
Bài 2: Thực hiện phép tính
a) (-5) + (-12) = -17 d) 12 - 11 +15 - 27 +11 = 2
b) (-9) +12 = 3 e) 1032 - [314 -(314 +32)] = 1000
c) 9 -12 = -3 g) [(-18) +(-7) ] + 15 = -10
a, -17 d, 12 - 11 + 15 - 27 + 11 e , 1032 - [314 - ( 314 + 32 )]
b , 3 = 12 - 11 + 15 - 27 = 1032 - [ 314 + ( -314) + 32 ]
c, -3 = -11 = 1032 - 32
= 1000
g , -10 ( CÂU A , B , C , G RẤT DỄ NÊN GIRL CHỈ VIẾT DÁP ÁN CÒN CÂU D VÀ E GIRL VIẾT CÂU BÀI LÀM + ĐÁP ÁN ĐÓA NHA NHỚ K VÀ KB NẾU CÓ THỂ