\(\frac{47}{53}\div\frac{17}{52}-\frac{47}{53}\times\frac{35}{17}\)

\(=\frac{47}{53}\times\frac{52}{17}-\frac{47}{53}\times\frac{35}{17}\)

\(=\frac{47}{53}\times(\frac{52}{17}-\frac{35}{17)}\)

\(=\frac{47}{53}\times\frac{17}{17}=\frac{47}{53}\times1=\frac{47}{53}\)

=47 x (52+49-1)=47x 100= 4700

47 x 52 + 47 x 49 - 47

= 47 x 52 + 47 x 49 - 47 x 1

= 47 x (52+49-1)

= 47 x 100

= 4700

4700 kết quả học t

số số hạng có trong biểu thức trên là:

(58 - 40 ) : 1 + 1 = 19

=>( 40 - 41 ) + ( 42 - 43 ) + ... + ( 56 - 57 ) + 58

=> (-1) x  [( 19 - 1 ) : 2 ] + 58

=> (-1) x 9 + 58

=> (-9) + 58
=> 49
HT~~~

47 x 298 + 53 x 298

= 298 x (47 + 53)

= 298 x 100 

= 29 800

\(47\times298+53\times298=298\times\left(47+53\right)\)

\(=298\times100=29800\)

47 x 298 + 53 x 298

=( 47 + 53 ) x 298

= 100 x 298

= 29 800

\(42.53+47\left(156+114\right)\)

\(42.53+47.270\)

\(hixx\)\(\text{quên ùi}\)

hhhhhhhhhhhhhhhhh

42 x 53 + 47 x 156 + 47 x 114

= 42 x 53 + 47 x ( 156 + 114 )

= 42 x 53 + 47 x 270

= 2226 + 12690

= 14916

47 x 53 + 47 x 156 + 47 x 114

=47x(53+156+114)

=47x323

=15181

a) 32 + (53 + 58) + 47 = (32 + 58) + (53 + 47) = 90 + 100 = 190

B) 53 + 8 * 53 + 53 = 53 * 1 + 53 * 8 + 53 * 1 = 53 * (1 + 8 + 1) = 53 * 10 = 530

...... minh cung dang tim cau hoi nay

a) 78 x 31 + 78 x 24 + 78 x 17 x 22 x 72 

= 78 x ( 31 + 24 + 17) x 22 x 72

= 78 x 72 x 22 x 72

= ( 78 + 22 ) x 72

= 100 x 72

= 7200

b. thi de roi ha nen tu lam

đúng rùi

haha

A) (47+53)x298=29800

B) (426+574)x617=617000

C) 396x(37-27)=3960

a)29800

b)617000

c)7920

a)29800

b)617000

c)7920