46:24+8:24

= ( 46+8):24

= 54:24

=2 ( dư 6)

705:45-336:45

= ( 705-336):45

= 369:45

= 8,8

dư 6 là sao hả bạn ? Có thể thành số thập phân đc mà

\(\dfrac{12}{7}\) \(\times\) \(\dfrac{3}{4}\) - \(\dfrac{3}{4}\) \(\times\) \(\dfrac{12}{7}\)

= \(\dfrac{9}{7}\) - \(\dfrac{9}{7}\)

= 0 

23,4x 12,5 +12,5 x 75,6 + 12,5

23,4x 12,5 +12,5 x 75,6 + 12,5 x 1

12,5 x(23,4+75,6+1)

12,5 x     100

1250  

23,4x12,5+12,5x75,6+12,5=12,5x(23,4+75,6+1)=12,5x100=1250

=1,2x(1,25+8,75)

=1,2x10

=12

~~TK MK NHA BN~~

= 1,2 x ( 1,25 + 8,75)

= 1,2 x 10

= 12

a) 0,12 x 400 = 0,12 x 100 x 4 = 12 x 4 = 48

4,7 x 5,5 - 4,7 x 4,5 = 4,7 x (5,5 - 4,5) = 4,1 x 1 = 4,7

k cho chi đi

A = \(2000-\left\{46-\left[24+74.4\right]:15\right\}\)

A = \(2000-\left\{46-\left[24+296\right]:15\right\}\)

A = \(2000-\left\{46-320:15\right\}\)

A = \(2000-\left(46-\frac{64}{3}\right)\)

A = \(2000-\left(\frac{138}{3}-\frac{64}{3}\right)\)

A = \(2000-\frac{74}{3}\)

A = \(\frac{6000}{3}-\frac{74}{3}\)

A = \(\frac{5926}{3}\)

= 17/7 + 4/7 - 2/5 + 3/5

= 21/7 - 5/5

= 3 - 1

= 2

25x1357x4

=1357x(25x4)

=1357x100

=135 700

giui giup toi nha 

\(a,\dfrac{5}{9}\times\dfrac{5}{2}+\dfrac{4}{9}\times\dfrac{5}{2}=\dfrac{5}{2}\times\left(\dfrac{5}{9}+\dfrac{4}{9}\right)=\dfrac{5}{2}\times1=\dfrac{5}{2}\)

\(12\times\dfrac{3}{4}-\dfrac{3}{4}\times\dfrac{12}{7}=\dfrac{3}{4}\times\left(12-\dfrac{12}{7}\right)=\dfrac{3}{4}\times\dfrac{72}{7}=\dfrac{54}{7}\)