\(257.43-43.57+2.19.57+57.62\)

\(=43.\left(257-57\right)+38.57+57.62\)

\(=43.\left(257-57\right)+57.\left(38+62\right)\)

\(=43.200+57.100\)

\(=8600+5700\)

\(=14300\)

a)3232+32.99+235.68-35.68=3200+32+(32.99)+235.68-35.68

                                         =3200+(32.100)+68.(235-35)

                                         =3200+3200+68.200

                                         =3200+3200+13600

                                         =6400+13600=20000

2003² - 2002.2003

= 2003.(2003 - 2002)

= 2003 . 1

= 2003

-------------------

7(x - 2) + 2³ = 2.5²

7(x - 2) + 8 = 2.25

7(x - 2) = 50 - 8

7(x - 2) = 42

x - 2 = 42 : 7

x - 2 = 6

x = 6 + 2

x = 8

-------------------

23 + (27 - 7.6) - (94.7 - 27.99)

= 23 + 27 - 42 - 658 + 2673

= 23 + (27 + 2673) - (42 + 658)

= 23 + 2700 - 700

= 23 + 2000

= 2023

`2023^2-2022.2023`

`=2023.2023-2022.2023`

`=2023.(2023-2022)`

`=2023.1`

`=2023`

__

` 23 + (27 - 7.6) - (94.7 - 27.99)`

` = 23 + (27 - 42) - (658 - 2673)`

` = 23 + (-15) - (-2015)`

` = 8 + 2015`

` = 2023`

\(2023^2-2022.2023\)

\(=2023\left(2023-2022\right)\)

\(=2023.1\)

\(=2023\)

\(23+\left(27-7.6\right)-\left(94.7-27.99\right)\)

\(=23+27-7.6-94.7+27.99\)

\(=23+\left(27+27.99\right)-\left(7.6+94.7\right)\)

\(=23+27\left(1+99\right)-7.\left(6+94\right)\)

\(=23+27.100-7.100\)

\(=23+2000\)

\(=2023\)

16+(27-7.6)-94.7-27.99

=16+27-7.6-94.7-27.99

16+27(1+99)-7(6+94)=+2700-700=2016

đúng thì tk cho mk nha

2016 nha ban

Đáp án là 2016 bạn nha

=2016 nha

Mình tính ra là 2023.Có ai có ý kiến không ?

what the heo my

mình ra 2023 có ai ra 2023 ko

ai có thì để lại cho mik 1 cái tích đúng nha

cảm ơn các bạn

1/2

\(\dfrac{1515}{6363}\times\dfrac{212121}{606060}:\dfrac{9}{54}=\dfrac{5}{9}\times\dfrac{7}{20}:\dfrac{1}{6}=\dfrac{7}{36}:\dfrac{1}{6}=\dfrac{7}{6}\)

\(\dfrac{45}{63}=\dfrac{9\text{×}5}{9\text{×}7}=\dfrac{5}{7}\)

\(\dfrac{45}{63}=\dfrac{45:9}{63:9}=\dfrac{5}{7}\)

5/7 nha