1) 5 + (-4) = 1

2) (-8) + 2 = -6

3) 8 + (-2) = 6

4) 11 + (-3) = 8

5) (-11) + 2 = -9

6) (-7) + 3 = -4

7) (-5) + 5 = 0

8) 11 + (-12) = -1

9) (-18) + 20 = 2

10) (15) + (-12) = 3

11) (-17) + 17 = 0

12) 16 + (-2) = 14

13) (30) + (-14) = 16

14) (-19) + 20 = 1

15) (-18) + 15 = -3

16) (10) + (-6) = 4

17) (-28) + 14 = -14

18) 15 + (-30) = -15

19) (15) + (-4) = 11

20) (-21) + 11 = -10

21) 8 + (-22) = -14

22) (-15) + 4 = -11

23) (-3) + 2 = -1

24) 17 + (-14) = 3

25) 17 + (-14) = 3

thế này đọc đc mới đỉnh

6/7+(2/11-6/7)

=6/7+2/11-6/7

=2/11

6/7+(2/11-6/7)

=6/7+2/11-6/7

=6/7-6/7+2/11

=0+2/11

=2/11

\(\frac{6}{7}+\left(\frac{2}{11}-\frac{6}{7}\right)\)

\(=\frac{6}{7}+\frac{2}{11}-\frac{6}{7}\)

\(=\left(\frac{6}{7}-\frac{6}{7}\right)+\frac{2}{11}\)

\(=\frac{2}{11}\)

+

\(\frac{6}{7}+\left(\frac{2}{11}-\frac{6}{7}\right)\)

\(=\frac{6}{7}+\frac{2}{11}-\frac{6}{7}\)

\(=\left(\frac{6}{7}-\frac{6}{7}\right)+\frac{2}{11}\)

\(=\frac{2}{11}\)

6/7+(2/11-6/7)

=6/7+2/11-6/7

=6/7-6/7+2/11

=0+2/11

=2/11

+

\(\frac{6}{7}+\left(\frac{2}{11}-\frac{6}{7}\right)\)

\(=\frac{6}{7}+\frac{2}{11}-\frac{6}{7}\)

\(=\left(\frac{6}{7}-\frac{6}{7}\right)+\frac{2}{11}\)

\(=\frac{2}{11}\)

55/21

\(=\dfrac{5\left(5+2\right)}{11.7}+\dfrac{6}{11}=\dfrac{5}{11}+\dfrac{6}{11}=1\)

Ta có:

= 5/11 .( 5/7+ 2/7 ) + 6/11

= 5/11 . 1 + 6/11

= 11/ 11

= 1

#học tốt ạ :3

=7/11+5/6+4/11-1/6

=(7/11+4/11)+(5/6-1/6)

=1+2/3

=5/3

\(A,\dfrac{7}{11}+\dfrac{5}{6}-\dfrac{-4}{11}-\dfrac{1}{6}\)

\(= (\dfrac{7}{11}+\dfrac{-4}{11})-(\dfrac{5}{6}-\dfrac{1}{6})\)

\(=\dfrac{3}{11}-\dfrac{2}{3}\)

\(= \dfrac{9}{33}-\dfrac{22}{33}\)

\(= \dfrac{-13}{33}\)

\(B,\dfrac{5}{9}.\dfrac{7}{3}+\dfrac{5}{9}.\dfrac{9}{13}-\dfrac{5}{9}:\dfrac{13}{5}\)

\(=(\dfrac{5}{9}.\dfrac{5}{9}:\dfrac{5}{9}).\dfrac{7}{3}+\dfrac{9}{13}-\dfrac{13}{5}\)

\(=(\dfrac{5}{9}.\dfrac{7}{3})+(\dfrac{9}{13}-\dfrac{13}{5})\)

\(=(\dfrac{5}{9}.\dfrac{21}{9})+(\dfrac{45}{65}-\dfrac{169}{65})\)

\(=\dfrac{35}{27}+\dfrac{-124}{65}\)

\(=\dfrac{2275}{1755}+\dfrac{-3348}{1755}\)

\(=\dfrac{-1073}{1755}\)

\(A=\left(2^5\cdot2^7\right):2^{10}+5\cdot3^4-6^3:6\\ =2^{12}:2^{10}+5\cdot3^4-6^2\\ =2^2+5\cdot3^4-36\\ =4+405-36\\ =373\\ B=\left(5^2-3\right):11\\ =\left(25-3\right):11\\ =22:11\\ =2\\ C=\left(5^{2022}-5^{2021}\right):5^{2021}\\ =5^{2021}\cdot\left(5-1\right):5^{2021}\\ =4\\ D=\left(7^{20}-7^{19}\right):7^{19}\\ =7^{19}\cdot\left(7-1\right):7^{19}\\ =6\)

đợi tí

a) 373

b) 2

c) 4

d) 6

a)

\(\frac{5}{6}-\frac{57}{12}\)

=\(-\frac{47}{12}\)

b)

\(=\frac{3}{7}\left(\frac{9}{11}+\frac{2}{11}\right)\)

\(=\frac{3}{7}.1=\frac{3}{7}\)