2^10:2⁵+3².2²-4³

=2⁵⁺9.4-64

=32+36-64

=68-64

=4

b) 1449 - {[(216 + 184) : 8] . 9}

=  1449 - {[400 : 8] : 9}

=  1449 - {50 : 9}

=  1449 - \(\frac{50}{9}\)

=  \(\frac{12991}{9}\)

c) 342 . 163 + 337 . 342 - 10³ . 171

=  342 . (163 + 337) - 1000 . 171

=  342 . 500 - 500 . 2 . 171

=  500 . (342 - 2 - 171)

=  500 . 169

=  84500

1449-[216-184:8).9]

=1449-[216-23).9]

=1449-(193.9)

=1449-1737

=-288

24 : { 300 : [ 375 ( 150 + 15 . 5 ) ] }

24 : { 300 : [ 375 ( 150 + 75 ) ] }

24 : [ 300 : ( 375 . 225 ) ]

24 : ( 300 : 84375 )

24 : 4/1125

= 6750

muốn giải nhanh thì bấm máy tính đi

a, \(24:\left\{300:\left[375-\left(150+15.5\right)\right]\right\}\)

\(=24:\left\{300:\left[375-\left(150+325\right)\right]\right\}\)

\(=24:\left\{300:\left[375-225\right]\right\}\)

\(=24:\left\{300:150\right\}\)

\(=24:2=12\)

b, \(1449:\left[\left(216+184\right):8\right].9\)

\(=1449:\left[400:8\right].9\)

\(=1449:50.9\)

\(=28,98.9=260,82\)

c, \(222+224+......+444\)

\(=\dfrac{\left[\left(444-222\right):2+1\right]\left(444+222\right)}{2}\)

\(=37264\)

d, \(127.36+64.127-127.100\)

\(=127\left(36+64-100\right)\)

\(=127.0=0\)

24:\(\left\{300:\left[375-\left(150+15.5\right)\right]\right\}\)

=24:\(\left\{300:\left[375-15.\left(10-5\right)\right]\right\}\)

=24:\(\left\{300:\left[15.25-15.5\right]\right\}\)

=24:\(\left\{300:\left[15.\left(25-5\right)\right]\right\}\)

=24:\(\left\{300:\left[15.20\right]\right\}\)

=24:\(\left\{300:300\right\}\)

=24:1=24

Bài 1:

2 . 31 . 12 + 4 . 6 . 42 + 8 . 27 . 3 - 400

= 2 . 12 . 31 + 4 . 6 . 42 + 8 . 3 . 27 - 400

= 24 . 31 + 24 . 42 + 24 . 27 - 400

= 24 . ( 31 + 42 + 27 ) - 400

= 24 . 100 - 400

= 2400 - 400

= 2000

~ Chúc bạn học giỏi ! ~

2³ . 17 - 2³ . 14

= 2³ . ( 17 - 14 )

= 2³ . 3

= 8 . 3

= 24

~ Chúc bạn học giỏi ! ~