\(\frac{37}{45}-\left(\frac{7}{45}-\frac{36}{108}-\frac{5}{13}\right)=\frac{37}{45}-\frac{7}{45}+\frac{36}{108}+\frac{5}{13}.\)

                                                           \(=\left(\frac{37}{45}-\frac{7}{45}\right)+\left(\frac{36}{108}+\frac{5}{13}\right)\)

                                                            \(=\frac{2}{3}+\frac{28}{39}\)

                                                              \(=\frac{18}{13}\)

\((\frac{37}{45}-\frac{7}{45})+(\frac{36}{108}-\frac{5}{13})\)

=\(\frac{2}{3}+-\frac{2}{39}\)=\(\frac{8}{13}\)

\(\frac{37}{45}-\left(\frac{7}{45}-\frac{36}{108}-\frac{5}{13}\right)\)

\(=\frac{37}{45}-\frac{7}{45}+\frac{1}{3}+\frac{5}{13}\)

\(=\left(\frac{37}{45}-\frac{7}{45}+\frac{1}{3}\right)+\frac{5}{13}\)

\(=\left(\frac{2}{3}+\frac{1}{3}\right)+\frac{5}{13}\)

\(=1+\frac{5}{13}\)

\(=\frac{18}{13}\)

\(=\frac{8}{13}\)

a) ( 36 x 28 + 36 x 45 ) : 73

= 36 x (28 + 45 ):73

=36 x 73 :73

= 36 x (73 : 73)

= 36 x 1

= 36

b) ( 98 x 17 - 26 x 17 ) : 72

= 17 x (98-17):72

= 17 x 72 :72

=17 x (72 :72)

= 17 x 1

= 17

a) ( 36 x 28 + 36 x 45 ) : 73 = 36 

b) ( 98 x 17 - 26 x 17 ) : 72 = 17 

Bạn phải giải hẳn ra

1/Ta co :

\(\dfrac{15}{7}.\left(\dfrac{1}{5}-\dfrac{46}{45}\right)+\dfrac{46}{45}.\left(\dfrac{15}{7}-\dfrac{45}{46}\right)\)

=\(\dfrac{15}{7}.\dfrac{1}{5}-\dfrac{15}{7}.\dfrac{46}{45}+\dfrac{46}{45}.\dfrac{15}{7}-\dfrac{46}{45}.\dfrac{45}{46}\)

=\(\dfrac{15}{7}.\left(\dfrac{1}{5}-\dfrac{46}{45}+\dfrac{46}{45}\right)-1\)

=\(\dfrac{15}{7}.\dfrac{1}{5}-1\)

=\(\dfrac{3}{7}-1=\dfrac{-4}{7}\)

2/Ta co

\(\dfrac{43}{47}.\left(\dfrac{18}{37}+\dfrac{47}{43}\right)-\dfrac{18}{3}.\left(\dfrac{43}{47}+\dfrac{37}{36}\right)\)

=\(\dfrac{43}{47}.\dfrac{18}{37}+\dfrac{43}{47}.\dfrac{47}{43}-\dfrac{18}{37}.\dfrac{43}{47}+\dfrac{18}{37}.\dfrac{37}{36}\)

=\(\dfrac{18}{37}.\left(\dfrac{43}{37}-\dfrac{43}{37}+\dfrac{37}{36}\right)+1\)

=\(\dfrac{18}{37}.\dfrac{37}{36}+1\)

=\(\dfrac{1}{2}+1=\dfrac{3}{2}\)

tick cho mk nha

a) Cách 1: \(73 - \left( {2 - 9} \right) = 73 - 2 + 9 = 80\);

Cách 2: \(73 - \left( {2 - 9} \right) = 73 -(-7)=73+7 = 80\)

b) Cách 1: \(\left( { - 45} \right) - \left( {27 - 8} \right) = \left( { - 45} \right) - 27+8 =-72+8=- 64\)

 Cách 2: \(\left( { - 45} \right) - \left( {27 - 8} \right) = \left( { - 45} \right) - 19 =  - 64\)

-4.7075039e+15

\(\left(313^5.299-313^6.39\right)⋮7\)

\(=\left(313^5.299-313^5.3.39\right)\)

\(=\left(313^5.299-313^5.117\right)\)

\(=313^5\left(299-117\right)\)

\(=313^5.182⋮7\)

botay.com.vn

D=18/10.30/22...........10908/10900

D=18.30........10908  /   10.22.10900

D=(2.9)(3.10).....(101.108)  /  (1.10)(2.11).....(100.109)

D=(2.3.......101)(9.10......108)  /   (1.2....100) (10.11....109)

D=101.9/109=909/109

G=(1+8/10)(1+8/22)(1+8/36)...(1+8/8352)

       18.30.44...8360

G=----------------------------

        10.22.36...8352

       9.2.10.3.11.4...95.88

G=-----------------------------------

      10.1.11.2.12.3...96.87

        (9.10.11...95)(2.3.4....88)

G=  -----------------------------------------

        (10.11.12...96)(2.3.4...87)

       9.88.     

G= ---------= 33/4.

       96

ha ha ha thanks 

Mình cũng k biết làm bài này, cảm ơn bạn

=1*(1/28-1/36-1/45-1/153)

=1*125/4284

=125/4284

a: \(2^2\cdot5-\dfrac{\left(1^{10}+8\right)}{3^2}\)

\(=4\cdot5-\dfrac{1+8}{3}\)

=20-3

=17

b: \(5^8:5^6+4\left(3^2-1\right)\)

\(=5^2+4\left(9-1\right)\)

=25+4*8

=25+32

=57

c: \(400-\left\{36-20:\left[3^3-\left(8-3\right)\right]\right\}\)

\(=400-36+20:\left[27-5\right]\)

\(=364+\dfrac{20}{22}\)

\(=364+\dfrac{10}{11}=\dfrac{4014}{11}\)

A) 2².5 - (1¹⁰ + 8) : 3²

= 4.5 - (1 + 8) : 9

= 20 - 9 : 9

= 20 - 1

= 19

B) 5⁸ : 5⁶ + 4.(3² - 1)

= 5² + 4.(9 - 1)

= 25 + 4.8

= 25 + 32

= 57

C) 400 - {36 - 20 : [3³ - (8 - 3)]}

= 400 - [36 - 20 : (27 - 5)]

= 400 -(36 - 20 : 22)

= 400 - (36 - 10/11)

= 400 - 386/11

= 4014/11