Question

Answer 1

\(c,7^2+\left[36-\left(100-64\right)\right]\\ =49+\left[36-36\right]\\ =49+0\\ =49\)

\(d,2026-2000:\left[486-2.\left(7^2-6\right)\right]\\ =2026-2000:\left[486-2.\left(49-6\right)\right]\\ =2026-2000:\left[486-2.43\right]\\ =2026-2000:\left[486-86\right]\\ =2026-2000:400\\ =2026-5\\ =2021\)

Answer 2

`7^2 +[36-(100-64)]`

`= 49 +(36-36)`

`=49 +0`

`=49`

`-----------`

`2026 - 2000 : [486-2.(7^2-6)]`

`= 2026 - 2000 : [486-2.(49-6) ]`

`= 2026 - 2000 : (486-2.43)`

`= 2026 - 2000 : (486-86)`

`=  2026 - 2000 : 400`

`=   2026 -5`

`=2021`

`#L`

Answer 3

c)

\(7^2+\left[36-\left(100-64\right)\right]\\ =49+\left(36-100+64\right)\\ =49+36-100+64\\ =36+64-100+49\\ =49\)

d)

\(2026-2000:\left[486-2\cdot\left(7^2-6\right)\right]\\ =2026-2000:\left[486-2\cdot\left(49-6\right)\right]\\ =2026-2000:\left(486-2\cdot43\right)\\ =2026-2000:\left(486-86\right)\\ =2026-2000:400\\ =2026-5\\ =2021\)

Answer 4

c, 7² + [ 36 - ( 100 - 64 ) ]

= 49 + [ 36 - 36 ]

= 49 

d, 2026 - 2000 : [ 486 - 2.( 7² - 6 ) ]

= 2026 - 2000 : [ 486 - 2.( 49 - 6 ) ]

= 2026 - 2000 : [ 486 - 2 . 43 ]

= 2026 - 2000 : [ 486 - 86 ]

= 2026 - 2000 : 400

= 2026 - 5

= 2021

 

Answer 5

\(c,7^2+\left[36-\left(100-64\right)\right]\)

\(=49+\left[36-36\right]\)

\(=49+0\)

\(=49\)
________________________
\(d,2026-2000:\left[486-2\left(7^2-6\right)\right]\)

\(=2026-2000:\left[486-2.43\right]\)

\(=2026-2000:\left[486-86\right]\)

\(=2026-2000:400\)

\(=2026-5\)

\(=2021\)