a/ a^3 *a^9
b/(a^5)^7
c/(a^6)^4*a^12
d/5^6 :5^4 -3^3:3^2
e/4*5^2-2^5*3^0
Những câu hỏi liên quan
21 tháng 3 2022 lúc 9:26
a) 5/8 + 4/9
b) 10/14 - 3/7
c) 7/10 x 25/24
d) 3/4 : 9/6
a) \(\dfrac{5}{8}+\dfrac{4}{9}=\dfrac{45}{72}+\dfrac{32}{72}=\dfrac{77}{72}\)
b) \(\dfrac{10}{14}-\dfrac{3}{7}=\dfrac{10}{14}-\dfrac{6}{14}=\dfrac{4}{14}=\dfrac{2}{7}\)
c) \(\dfrac{7}{10}\times\dfrac{25}{24}=\dfrac{175}{240}=\dfrac{35}{48}\)
d) \(\dfrac{3}{4}\div\dfrac{9}{6}=\dfrac{3}{4}\times\dfrac{6}{9}=\dfrac{18}{36}=\dfrac{1}{2}\)
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a) 5/8 + 4/9 = 77/52
b) 10/14 - 3/7 = 2/7
c) 7/10 x 25/24 = 35/48
d) 3/4 : 9/6 = 1/2
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2 và 3 phần 4 + 3 và 2 phần 3 là?
A: 5 và 5 phần 7
B: 5 và 17 phần 12
C: 6 và 5 phần 12
D: 5 và 6 phần 12
Tính:
a, 4 1/3 . 4/9 + 13 2/3 . 4/9
b, 5 1/4 . 3/8 + 10 3/4 . 3/8
c, 6 1/5 . ( -2/7 ) + 14 4/5 . ( -2/7 )
d, 7 1/6 . ( -7/6 ) + 10 5/6 . ( -7/6 )
a/4 =b/6 ;b/5 =c/8 vaf 5a -3b-3c
3a -5b +7c =86 vaf a+3/5 =b-2/3 =c-1/7
a-2b +c =46 vaf a/7 =b/6;b/5 =c/8
5a =8b =3c vaf a-2b +c =34
a^2 +3b^2 -2c^2 =-16 vaf a/2=b/3=c/4
(2/5 -x) :4/3 +1/2 =-4
(-3 +3/x -1/3 ) : ( 1+ 2/5 +2/3 ) =-5/4
-3x/4 .(1/x +2/7 )=0
a)11/4 + ( -3/5 + 1/3) : -4/9
b) 2/6 - (-3/3 + 4/7) : -9/5
c) 21 - 15/4 : ( 3/8 -1/6)
a: \(\dfrac{11}{4}+\left(-\dfrac{3}{5}+\dfrac{1}{3}\right):\dfrac{-4}{9}\)
\(=\dfrac{11}{4}+\dfrac{-9+5}{15}\cdot\dfrac{9}{-4}\)
\(=\dfrac{11}{4}+\dfrac{-4}{15}\cdot\dfrac{9}{-4}\)
\(=\dfrac{11}{4}+\dfrac{3}{5}=\dfrac{55+12}{20}=\dfrac{67}{20}\)
b: \(\dfrac{2}{6}-\left(-\dfrac{3}{3}+\dfrac{4}{7}\right):\dfrac{-9}{5}\)
\(=\dfrac{2}{6}-\left(-1+\dfrac{4}{7}\right)\cdot\dfrac{-5}{9}\)
\(=\dfrac{2}{6}-\dfrac{-3}{7}\cdot\dfrac{-5}{9}\)
\(=\dfrac{1}{3}-\dfrac{15}{63}\)
\(=\dfrac{6}{63}=\dfrac{2}{21}\)
c: \(21-\dfrac{15}{4}:\left(\dfrac{3}{8}-\dfrac{1}{6}\right)\)
\(=21-\dfrac{15}{4}:\dfrac{3\cdot3-4}{24}\)
\(=21-\dfrac{15}{4}\cdot\dfrac{24}{5}\)
\(=21-3\cdot6=3\)
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\(a.\dfrac{11}{4}+\left(-\dfrac{3}{5}+\dfrac{1}{3}\right):-\dfrac{4}{9}\)
\(=\dfrac{11}{4}+\left(-\dfrac{4}{15}\right):-\dfrac{4}{9}\)
\(=\dfrac{11}{4}+\dfrac{3}{5}=\dfrac{67}{20}\)
\(b.\dfrac{2}{6}-\left(-\dfrac{3}{3}+\dfrac{4}{7}\right):-\dfrac{9}{5}\)
\(=\dfrac{2}{6}-\left(-\dfrac{3}{7}\right):-\dfrac{9}{5}\)
\(=\dfrac{2}{6}-\dfrac{5}{21}=\dfrac{2}{21}\)
\(c.21-\dfrac{15}{4}:\left(\dfrac{3}{8}-\dfrac{1}{6}\right)\)
\(=21-\dfrac{15}{4}:\dfrac{5}{24}\)
\(=21-18=3\)
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bài 3 : Tìm X ∈ Z , biết :
a) -6 < x < 0
b) -3 ≤ x < 7
c) -5 < x < 5
d) -3 ≤ x x < 3
Bài 4 : Cộng hai số nguyên cùng dấu :
a) (+6) + (+5)
b)) ( -5) + (-4)
c) (-3) + (-7)
d) (-1) + (-4)
e) (-12) + (-5)
f) -25 + (-30)
g) -33 + (-44)
h) -100+(-170)
Bài 3:
a: \(x\in\left\{-5;-4;-3;-2;-1\right\}\)
b: \(x\in\left\{-3;-2;-1;0;1;2;3;4;5;6\right\}\)
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a: x∈{−5;−4;−3;−2;−1}
b: x∈{−3;−2;−1;0;1;2;3;4;5;6}
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a,a/b+5/6=7/8
b,a/b*2/3=3/4
c,5/8-a/b=5/12
d,5/8+a/b=3/8
a) a/b = 7/8 - 5/6
a/b = 1/24
b) a/b = 3/4 : 2/3
a/b = 9/8
c) a/b = 5/8 - 5/12
a/b= 5/24
d) a/b = 3/8 - 5/8
a/b = -2/8 -1/4
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Cho A = {0; 1; 2; 3; 4} và B = {2; 3; 4; 5; 6}. Kết quả của phép toán (A\B) ∪ (B\A) là:
A. {0; 1; 5; 6}; B. {1; 2}; C. {2; 3; 4}; D. {5; 6}.
A \ B = {0,1}
B \ A = {5;6}
(A\B) U (B\A) = {0;1;5;6}
=> A
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a,dfrac{7}{8}xdfrac{2}{5}b,dfrac{9}{4}-dfrac{5}{6}c,dfrac{4}{7}xdfrac{2}{5}d,dfrac{3}{5}+2e,4 - dfrac{3}{5}g,3xdfrac{4}{9}h,dfrac{9}{5}: 2
Đọc tiếp
a,\(\dfrac{7}{8}\)x\(\dfrac{2}{5}\)
b,\(\dfrac{9}{4}\)\(-\)\(\dfrac{5}{6}\)
c,\(\dfrac{4}{7}\)x\(\dfrac{2}{5}\)
d,\(\dfrac{3}{5}\)+2
e,4 \(-\) \(\dfrac{3}{5}\)
g,3x\(\dfrac{4}{9}\)
h,\(\dfrac{9}{5}\): 2
a. 7/8 x 2/5 =7/20
b.9/4-5/6=17/12
c.4/7x2/5=8/35
d.3/5+2=13/5
e. 4-3/5=17/5
g.3x4/9=4/3
h.9/5:2=9/10
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a) \(\dfrac{14}{40}=\dfrac{7}{20}\)
b) \(\dfrac{27}{12}-\dfrac{10}{12}=\dfrac{17}{12}\)
c) \(\dfrac{8}{35}\)
d) \(\dfrac{3}{5}+\dfrac{10}{5}=\dfrac{13}{5}\)
e) \(\dfrac{20}{5}-\dfrac{3}{5}=\dfrac{17}{5}\)
g) \(\dfrac{12}{9}=\dfrac{4}{3}\)
h) \(\dfrac{9}{5}x\dfrac{1}{2}=\dfrac{9}{10}\)
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`@LQuyen`
\(\dfrac{7}{8}\times\dfrac{2}{5}=\dfrac{14}{40}\)
\(\dfrac{9}{4}-\dfrac{5}{6}=\dfrac{54}{24}-\dfrac{20}{24}=\dfrac{34}{24}\)
\(\dfrac{4}{7}\times\dfrac{2}{5}=\dfrac{8}{35}\)
\(\dfrac{3}{5}+\dfrac{2}{1}=\dfrac{3}{5}+\dfrac{10}{5}=\dfrac{13}{5}\)
\(\dfrac{4}{1}-\dfrac{3}{5}=\dfrac{20}{5}-\dfrac{3}{5}=\dfrac{17}{5}\)
\(3\times\dfrac{4}{9}=\dfrac{12}{9}\)
\(\dfrac{9}{5}:2=\dfrac{9}{10}\)
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