= 49 x 2 + [ 121 - 2² ]

= 98 + [ 121 -  4 ]

= 98 + 117

= 215

7² . 2 + [11² - (12 - 10)²]

= 49 . 2 + (121 - 2²)

= 98 + (121 - 4)

= 98 + 117

= 215

⚽Mik cũng đang suy nghĩ nhé♬

2443/8

\(A=\left\{1;2;3;4;5;6\right\}\)

A ϵ {1; 2; 3; 4; 5; 6}

\(A=\left\{20;21;22;23;24;25;26\right\}\)

A ϵ{20;21;22;23;24;25;26}

\(\text{Ta có:}\)

\(\text{4000 : 82 = 48 (dư 64)}\)

=> \(\text{Số lớn nhất là: 48}\)

\(\text{Vậy số chia là các số nhỏ hơn 48}\) \(\ne0\)

\(\left(5^7+7^5\right)\cdot\left(6^8+8^6\right)\cdot\left(2^4-4^2\right)\\ \\ \\ \\ =\left(5^7+7^5\right)\cdot\left(6^8+8^6\right)\cdot\left(16-16\right)\\ \\ \\ \\ =\left(5^7+7^5\right)\cdot\left(6^8+8^6\right)\cdot0=0\)

0

a) \(\dfrac{-15}{4}:\dfrac{21}{-10}=\dfrac{-15}{4}.\dfrac{-10}{21}=\dfrac{25}{14}\)

b) \(\dfrac{-7}{14}:\left(-0,14\right)=\dfrac{-7}{14}.\dfrac{-50}{7}=\dfrac{25}{7}\)

c) \(\left(\dfrac{-11}{15}\right):1\dfrac{1}{10}=\dfrac{-11}{15}.\dfrac{10}{11}=\dfrac{-2}{3}\)

d) \(2\dfrac{1}{7}:1\dfrac{1}{14}=\dfrac{15}{7}.\dfrac{14}{15}=2\)

\(a.-\dfrac{15}{4}:\left(\dfrac{21}{-10}\right)\)

\(=-\dfrac{15}{4}\cdot\left(-\dfrac{10}{21}\right)\)

\(=\dfrac{25}{14}\)

\(b.-\dfrac{7}{14}:\left(-0,14\right)\)

\(=-\dfrac{1}{2}:\left(-\dfrac{7}{50}\right)\)

\(=\dfrac{25}{7}\)

\(c.\left(-\dfrac{11}{15}\right):\left(1\dfrac{1}{10}\right)\)

\(=\left(-\dfrac{11}{15}\right):\dfrac{11}{10}\)

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

\(d.\left(2\dfrac{1}{7}\right):\left(1\dfrac{1}{14}\right)\)

\(=\dfrac{15}{7}:\dfrac{15}{14}\)

\(=2\)

a) \(m\in A\)

b) \(p\in A\)

c) \(m\notin B\)

d) \(t\notin B\)

\(a,m\notin A\)

\(b,p\notin A\)

\(d,m\notin B\)

\(d,t\notin B\)

  ( 7 + 3³: 3²).4 - 3

= ( 7 + 3).4 - 3

= 10.4 - 3

= 37

   6²: 4.3 + 2.5

= 36 :4.3 + 2.5

= 9.3 + 10

= 27 + 10

= 37 

mux là mũ ^ đúng ko bn ui

Tổng chữ số của 2000 là: 2+0+0+0 = 2

=> 2000 chia cho 3 dư 2

Tổng chữ số của 88..8 (26cs8) là : 8x26 = 208

=> 88..8 (26cs8) chia cho 3 dư 1

=> 2000 + 88..8 chia hết cho 3