Question

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

1449:[(216+184):8].9

222+224+226+.....+444

127.36+64.127-127.100

Answer 1

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, \(127.36+64.127-127.100\)

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

\(=127.0=0\)

Answer 2

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

Answer 3

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

=1449:(400:8).9

=1449:50.9

=28,98.9=260,82

Answer 4

24:{300:[375-(150+15.5)]}=24:(300:(375-225))=24:(300:150)=24:2=12

Các câu sau tương tự

Answer 5

Đặt A =222+224+226+...+444

=>Số số hạng của A là :(444-222):2+1=112

=>A=(444+222).112:2=37296

Answer 6

127.36+64.127-127.100

=127.(36+64-100)

=127.(100-100)

=127.0

=0