c) 7/23 x [(-8/6) - 45/18]

d) 23\(\frac{1}{4}\) : \(\frac{7}{5}\) -  13\(\frac{1}{4}\) : \(\frac{5}{7}\)

e) 2⁵ x 15³ / 6³ x 10²

l) (1/3)¹⁰ x (9)²⁵ - (2/3)¹⁰ : (4/9)⁵

i) (-5)⁷ x (-1/5)⁷ + 0.5⁶ x (-2)⁶

Mọi người làm nhanh giùm mình với

Đúng ghi Đ, sai ghi S vào chỗ chấm:

a) \(\frac{3}{7}+\frac{1}{3}x\frac{3}{7}=\frac{16}{21}x\frac{3}{7}=\frac{16}{49}\)    ......

b)\(\frac{5}{9}+\frac{1}{5}x\frac{5}{6}=\frac{5}{9}x\frac{1}{6}=\frac{13}{18}\)    ......

c)\(\frac{13}{9}-\frac{7}{9}:\frac{2}{3}=\frac{6}{9}:\frac{3}{2}=1\)         ......

d)\(\frac{11}{8}-\frac{5}{8}:\frac{3}{4}=\frac{11}{8}-\frac{5}{8}x\frac{4}{3}=\frac{11}{8}-\frac{10}{24}=\frac{23}{24}\)    ......

c) 7/23 x [(-8/6) - 45/18]

d) 23 1/4: 7/5 - 13 1/4 : 5/7

e) 2⁵ x 15³ / 6³ x 10²

l) (1/3)¹⁰ x (9)²⁵ - (2/3)¹⁰ : (4/9)⁵

i) (-5)⁷ x (-1/5)⁷ + 0.5⁶ x (-2)⁶

Tính giá trị biểu thức

\(1.A=\frac{1}{5}+\frac{3}{17}-\frac{4}{3}+\left(\frac{4}{5}-\frac{3}{17}+\frac{1}{3}\right)-\frac{1}{7}+\left[\frac{-14}{30}\right]\)

\(2.B=\left(\frac{5}{8}-\frac{4}{12}+\frac{3}{2}\right)-\left(\frac{5}{8}+\frac{9}{13}\right)-\left[\frac{-3}{2}\right]+\frac{7}{-15}\)

\(3.C=\frac{5}{18}+\frac{8}{19}-\frac{7}{21}+\left(\frac{-10}{36}+\frac{11}{19}+\frac{1}{3}\right)-\frac{5}{8}\)

\(4.D=\frac{1}{9}-\left[\frac{-5}{23}\right]-\left(\frac{-5}{23}+\frac{1}{9}+\frac{25}{7}\right)+\frac{50}{14}-\frac{7}{30}\)

\(5.E=\frac{1}{13}+\left(\frac{-5}{18}-\frac{1}{13}+\frac{12}{17}\right)+\left(\frac{12}{17}+\frac{5}{18}+\frac{7}{5}\right)\)

\(6.F=\frac{15}{14}-\left(\frac{17}{23}-\frac{80}{87}+\frac{5}{4}\right)+\left(\frac{12}{17}-\frac{15}{14}+\frac{1}{4}\right)\)

\(7.G=\frac{1}{25}-\frac{4}{27}+\left(\frac{-23}{27}+\frac{-1}{25}-\frac{5}{43}\right)+\frac{5}{43}-\frac{4}{7}\)

\(8.H=\frac{4}{15}-\frac{23}{28}-\left(\frac{-23}{28}+\frac{-11}{15}-\frac{29}{27}\right)-\frac{2}{27}\)

\(9.K=\frac{1}{16}-\frac{5}{21}+\left(\frac{-1}{16}+\frac{-3}{5}-\frac{-5}{21}\right)+\frac{-2}{5}+\frac{3}{4}\)

\(10.L=\frac{7}{12}+\frac{15}{14}-\left(\frac{14}{22}+\frac{-1}{14}+\frac{5}{21}\right)-\frac{-5}{21}+\frac{3}{5}\)

Bài 1: Thực hiện phép tính bằng cách hợp lí < nếu có thể >

a, \(\left(-1,5\right).\left(1+\frac{2}{3}\right)+1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)

b, \(\frac{7}{5}+\frac{4}{5}\left(\frac{5}{8}-\frac{7}{4}\right)+2014^0\)

c, \(1\frac{3}{25}+\frac{17}{19}-\frac{3}{25}+0,9+\frac{2}{19}\)

d, \(-\frac{5}{9}.\frac{6}{13}+\frac{-5}{9}.\frac{7}{23}+\frac{5}{23}:\frac{9}{7}\)

Bài 2: Tìm x, biết

a, 20%x + 0,4x = 4,5

b, \(\left(3\frac{1}{2}-2\left|x-1\right|\right).2\frac{2}{3}=5\frac{1}{3}\)

HELP MEEEEE

Bài 1: Thực hiện phép tính bằng cách hợp lí ( nếu có thể )

a, \(\left(-1,5\right).\left(1+\frac{2}{3}\right)+1,4.\frac{15}{49}-\left(\frac{4}{5}+\frac{2}{3}\right):2\frac{1}{5}\)

b, \(\frac{7}{5}+\frac{4}{5}\left(\frac{5}{8}-\frac{7}{4}\right)+2014^0\)

c, \(1\frac{3}{25}+\frac{17}{19}-\frac{3}{25}+0,9+\frac{2}{19}\)

d, \(-\frac{5}{9}.\frac{6}{13}+\frac{-5}{9}.\frac{7}{23}+\frac{5}{23}:\frac{9}{7}\)

Bài 2: Tìm x, biết:

a, 20%x + 0,4x = 4,5

b, \(\left(3\frac{1}{2}-2\left|x-1\right|\right).2\frac{2}{3}=5\frac{1}{3}\)

HELP ME!

B. Tự luận

I: Đại số:

Bài 1: Thực hiện phép tính

1) 11/24 - 5/41 + 13/24 + 0,5 - 36/41

2) -12 : (3/4 - 5/6)^2

3) 7/23. [(-8/6) - 45/18]

4) \(23\frac{1}{4}.\frac{7}{5}-13\frac{1}{4}:\frac{5}{7}\)

5) (\(1+\frac{2}{3}-\frac{1}{4}\) ) (\(0,8\:-\frac{3}{4}\) )^2

6) 16\(\frac{2}{7}:\left(\frac{-3}{5}\right)+28\frac{2}{7}:\frac{3}{5}\)

7) \((2^2:\frac{4}{3}-\frac{1}{2}\) ) . 6/5 - 17

8) (1/3)^50 .(-9)^25 -2/3:4

9) 3/5: ( -1/15 - 1/6 )+3/5:( -1/3 - 1\(\frac{1}{15}\) )

10) (-6,5).5,7+5,7.(-3,5)

11) 10.√0,01.√16/9+3√49-1/6√4

12) \(\frac{2⁴.2⁶}{\left(2⁵\right)^2}-\frac{2⁵.15^3}{6^3.10^2}\)

Bài 2. Tìm x, biết

1) x/12 - 5/6 = 1/12

2) 2/3 - 1\(\frac{4}{15}x=\frac{-3}{5}\)

3) -2^3 + 0,5x =1,5

Nhiêu đó thôi mik còn thiếu nhiều lắm

Giải các phương trình sau :

a. 3x - 2 (5 + 2x) = 45 - 2x

b. \(\frac{x-3}{5}=6-\frac{1-2x}{3}\)

c.\(\frac{5\left(x-1\right)+2}{6}-\frac{7x-1}{4}=\frac{2\left(2x+1\right)}{7}-5\)

d. (x - 1) (5x + 3) = (3x - 8) (x - 1)

e. (x - 1) (x² + 5x - 2) - (x³ - 1) = 0

f.\(\frac{x-17}{33}+\frac{x-21}{29}+\frac{x}{25}=4\)

g. \(\frac{x+1}{65}+\frac{x+3}{63}=\frac{x+1}{61}+\frac{x+7}{59}\)

h.\(\frac{x+5}{2015}+\frac{x+4}{2014}+\frac{x+4}{1002}+\frac{x+6}{1003}=6\)

k.\(\frac{148-x}{25}+\frac{169-x}{23}+\frac{186-x}{21}+\frac{199-x}{19}=10\)