a: \(\left\{100:\left[45-45:\left(-9\right)\right]-32\right\}\cdot5-2\cdot5^2\)

\(=\left\{100:\left[45+5\right]-32\right\}\cdot5-2\cdot25\)

\(=\left\{100:50-32\right\}\cdot5-50\)

\(=\left(-30\right)\cdot5-50\)

=-150-50

=-200

b: \(\left(25-16-3^2\right)\cdot2024\)

\(=\left(9-9\right)\cdot2024\)

\(=0\cdot2024=0\)

c: \(\left(34-42-2023\right)\cdot128^0\)
\(=34-42-2023\)

=-8-2023

=-2031

a]82

B]31

C]35

D]80

các bạn khác chọn (k) đúng cho mình nha

\(=\dfrac{32}{21}\cdot\dfrac{22}{16}\cdot\dfrac{49}{45}\cdot\dfrac{5}{11}\)

\(=\dfrac{32}{16}\cdot\dfrac{22}{21}\cdot\dfrac{5}{11}\cdot\dfrac{49}{45}\)

\(=2\cdot\dfrac{49}{45}\cdot\dfrac{22}{11}\cdot\dfrac{5}{21}\)

\(=4\cdot\dfrac{49}{21}\cdot\dfrac{5}{45}=4\cdot\dfrac{1}{9}\cdot\dfrac{7}{3}=\dfrac{28}{27}\)

https://hoc24.vn/cau-hoi/a-929-135-569-b-587-319-307c-23-13-x-94-1312d-418-74-115e-47819-54-66819-54f-3221-x-4945-1622-x-1533g-2020x20189-2019x2020-2011giup-minh-voi-m.8283379351991

bn đừng đăng lại câu hỏi đã có ctrl nhé.

\(\dfrac{32}{21}\times\dfrac{49}{45}:\dfrac{16}{22}\times\dfrac{15}{33}\)

\(=\dfrac{32}{21}\times\dfrac{49}{35}\times\dfrac{22}{16}\times\dfrac{15}{33}\)

\(=\dfrac{2\times16\times7\times7\times2\times11\times3\times5}{3\times7\times5\times7\times16\times3\times11}\)

\(=\dfrac{2\times2}{3}\)

\(=\dfrac{4}{3}\)

 58/7 - (31/9 + 30/7)                  
= 58/7 - 31/9 - 30/7
= (58/7 - 30/7) - 31/9
= 28/7- 31/9
= 4 - 31/9 = 36/9 - 31/9
= 5/9

478/19÷(-5/4)-668/19÷(-5/4)
=(478/19-668/19):(-5/4)
=-10 . (-4/5)
=8

= =8/5

Ta có: \(-\frac{72}{45}=\frac{-72:9}{45:9}=\frac{-8}{5}\)

\(\frac{9}{21}=\frac{9:3}{21:3}=\frac{3}{7}\)

\(-\frac{16}{44}=\frac{-16:4}{44:4}=-\frac{4}{11}\)

\(\frac{-15}{-35}=\frac{-15:\left(-5\right)}{-35:\left(-5\right)}=\frac{3}{7}\)

\(\frac{-20}{-55}=\frac{-20:\left(-5\right)}{-55:\left(-5\right)}=\frac{4}{11}\)

\(-\frac{32}{20}=\frac{-32:4}{20:4}=-\frac{8}{5}\)

c: =30 năm 54 tháng

=33 năm 6 tháng

d: =9h60'=10h

e: =568s-59s=509s

f: =14 giờ 322 phút

=19h22'

CCứu em với

Hết cứu:))

\(-\dfrac{16}{18}.\dfrac{45}{32}-2,5=-\dfrac{5}{2}-\dfrac{5}{2}=-\dfrac{10}{2}=-5\)

a) x = 3

b) x = 53

c) x = 2024

d) x = 6